Question

find the product :
(4-3x) (7-3x)
(a+2b) (a-2b)

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Answer 1

Answer:

given

Step-by-step explanation:

(2x−3y)(a−2b)−(3x−2y)(a−2b)

⇒(2ax−3ay−4bx+6by)−(3ax−2ay−6bx+4by)

⇒2ax−3ay−4bx+6by−3ax+2ay+6bx−4ay

⇒−ax−ay+2bx+2by

⇒−a(x+y)+2b(x+y)

⇒(x+y)(2b−a) Ans

solution

Answer 2

1 = 28-12x-21x+9x^2
= 28 -33x +9x^2

2= a^2 - 2ab +2ab - 4b^2
= a^2 - 4b^2