{"id":9656,"date":"2023-09-24T11:50:38","date_gmt":"2023-09-24T06:20:38","guid":{"rendered":"https:\/\/conceptsdk.com\/?page_id=9656"},"modified":"2023-09-24T12:17:55","modified_gmt":"2023-09-24T06:47:55","slug":"chapter-9-algebraic-expressions-and-identities","status":"publish","type":"page","link":"https:\/\/conceptsdk.com\/?page_id=9656","title":{"rendered":"Chapter 9- Algebraic Expressions and Identities"},"content":{"rendered":"\n

Objective Questions (MCQ)<\/strong><\/p>\n\n\n\n

    \n
  1. What kind of polynomial is -5abc?
    (a) Monomial<\/strong>
    (b) Binomial
    (c) Trinonial
    (d) None of the above<\/li>\n\n\n\n
  2. The value ofx\u00b2 \u2013 2yx + y\u00b2 when x= 1; y = 2 is
    (a) 1<\/strong>
    (b) 2
    (c) 4
    (d) 5<\/li>\n\n\n\n
  3. Which of the following is a binomial?
    (a) 3xy
    (b) 41 + 5m<\/strong>
    (c) 2x + 3y-5
    (d) 4a \u2013 7ab + 3b + 12<\/li>\n\n\n\n
  4. The sum of -7x, 3x and 11x
    (a) \u2013 7x
    (b) 21x
    (c) 7x<\/strong>
    (d) -21x<\/li>\n\n\n\n
  5. What do you get when you subtract. -3xy from 5xy?
    (a) 3xy
    (b) 5xy
    (c) 8xy<\/strong>
    (d) 2xy<\/li>\n\n\n\n
  6. The volume of the cuboid of dimensions x, y, z is
    (a) x\u00b2y\u00b2z\u00b2
    (b) x\u00b3y\u00b3z\u00b3<\/strong>
    (c) xyz
    (d) x\u00b2y\u00b2z<\/li>\n\n\n\n
  7. The area of a rectangle with length 2l\u00b2m and breadth 31m\u00b2 is
    (a) l\u00b3m\u00b3
    (b) 2l\u00b3m\u00b3
    (c) 4l\u00b3m\u00b3
    (d) 6l\u00b3m\u00b3<\/strong><\/li>\n\n\n\n
  8. The value of (x + y) (x + y) + (y \u2013 z) (y + z) + (z \u2013 x) (z + x) is equal to
    (a) 3x\u00b2
    (b) 3y\u00b2
    (c) 3z\u00b2
    (d) 0<\/strong><\/li>\n\n\n\n
  9. Which of the following is the numerical coefficient of x\u00b2 y\u00b2?
    (a) 0
    (b) 1<\/strong>
    (c) x\u00b2
    (d) y\u00b2<\/li>\n\n\n\n
  10. Which of the following is the numerical coefficient of -5xy?
    (a) 2
    (b) x
    (c) 5
    <\/strong>(d) y<\/li>\n<\/ol>\n\n\n\n

    NCERT Solutions<\/strong><\/p>\n\n\n\n

    Ex 9.1 Class 8 Maths\u00a0Question 3.
    11. Add the following:
    (i) ab \u2013 bc, bc \u2013 ca, ca \u2013 ab
    (ii) a \u2013 b + ab, b \u2013 c + bc, c \u2013 a + ac
    (iii) 2p2<\/sup>q2<\/sup>\u00a0\u2013 3pq + 4, 5 + 7pq \u2013 3p2<\/sup>q2<\/sup>
    (iv) l2<\/sup>\u00a0+ m2<\/sup>, m2<\/sup>\u00a0+ n2<\/sup>, n2<\/sup>\u00a0+ l2<\/sup>, 2lm + 2mn + 2nl<\/p>\n\n\n\n

    Ex 9.1 Class 8 Maths\u00a0Question 4.<\/p>\n\n\n\n

    12. (a) Subtract 4a \u2013 7ab + 3b + 12 from 12a \u2013 9ab + 5b \u2013 3
    (6) Subtract 3xy + 5yz \u2013 7zx from 5xy \u2013 2yz \u2013 2zx + 10xyz
    (c) Subtract 4p2<\/sup>q \u2013 3pq + 5pq2<\/sup>\u00a0\u2013 8p + 7q \u2013 10 from 18 \u2013 3p \u2013 11q + 5pq \u2013 2pq2<\/sup>\u00a0+ 5p2<\/sup>q<\/p>\n\n\n\n

    13. Identify the terms, their coefficients for each of the following expressions.
    (i) 5xyz2<\/sup>\u00a0\u2013 3zy
    (ii) 1 + x + x2<\/sup>
    (iii) 4x2<\/sup>y2<\/sup>\u00a0\u2013 4x2<\/sup>y2<\/sup>z2<\/sup>\u00a0+ z2<\/sup>
    (iv) 3 \u2013 pq + qr \u2013 rp
    (v)\u00a0x\/2\u00a0+\u00a0y\/2\u00a0\u2013 xy
    (vi) 0.3a \u2013 0.6ab + 0.5b
    <\/p>\n","protected":false},"excerpt":{"rendered":"

    Objective Questions (MCQ) NCERT Solutions Ex 9.1 Class 8 Maths\u00a0Question 3.11. Add the following:(i) ab \u2013 bc, bc \u2013 ca, ca \u2013 ab(ii) a \u2013 b + ab, b \u2013 c + bc, c \u2013 a + ac(iii) 2p2q2\u00a0\u2013 3pq + 4, 5 + 7pq \u2013 3p2q2(iv) l2\u00a0+ m2, m2\u00a0+ n2, n2\u00a0+ l2, 2lm + […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"class_list":["post-9656","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/conceptsdk.com\/index.php?rest_route=\/wp\/v2\/pages\/9656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/conceptsdk.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/conceptsdk.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/conceptsdk.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/conceptsdk.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9656"}],"version-history":[{"count":5,"href":"https:\/\/conceptsdk.com\/index.php?rest_route=\/wp\/v2\/pages\/9656\/revisions"}],"predecessor-version":[{"id":9669,"href":"https:\/\/conceptsdk.com\/index.php?rest_route=\/wp\/v2\/pages\/9656\/revisions\/9669"}],"wp:attachment":[{"href":"https:\/\/conceptsdk.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}