Question

64a2-9b2+42bc-49c2 solve

Answer 1

64a2-((3b)2+(7c)2-2×3b×7c)
= 64a2-(3b-7c)2
=(8a)2-(3b-7c)2
=(8a+3b-7c) (8a-3b+7c)
Solved.

Answer 2

Answer:(8a-3b+7c)(8a+3b-7c)

Step-by-step explanation:

64a^2-9b^2+42bc-49c^2

64a^2-(9b^2-42bc+49c^2)

(8a)^2-{(3b)^2-2*3b*7c+(7c)^2}

(8a)^2-(3b-7c)^2

{8a-(3b-7c)}{8a+13b-7c)}

{8a-3b+7c}{8a+3b-7c}