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S.chand books class 8 maths solution chapter 12 Fundamental concept and Operations exercise 12 C

EXERCISE 12 C


QUESTION 1

Multiply :

(i) 12xy by -8x2

(ii) -16a2b2 by -5ab2

(iii) $\left(\dfrac{3}{5}a^2b^2\right) \text{ by } \left(\dfrac{10}{27}ab^4\right)$

(iv) $\left(-\dfrac{11}{8}xy^3\right)\text{ by } \left(-\dfrac{24}{55}x^4\right)$


QUESTION 2

Multiply :

(i) (6x-5) by -3x

(ii) (12x^2-4x+5) by 8x3

(iii) (3a^3x^3-4ay^2+7a^2y) by -4x2ya2


QUESTION 3

Find the product :

(i) (x+6)(x+11)

(ii) (2a+5)(3a-6)

(iii) (5x+2b)(5x-2b)

(iv) (6x^2-11x+7)(3x-4)

(v) (2x2-3x-1)(x-5)

(vi) (a4-a2b2+b4)(a2+b2)


QUESTION 4

Multiply :

(i) (a-b+c) by (a-b-c)

(ii) (x3-4x2+5x-2) by (x2+2x-1)

(iii) (2x2-5x+3) by (5x2-6x-4)

(iv) (3x4-x2+6x-7) by (x2-3x+4)

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