Math, asked by mmdboloz2220, 11 months ago

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

Answers

Answered by mohitkr6

6

Answer:

{3c - 7(a+b)}²

Step-by-step explanation:

= (3c)² +{7(a+b)}² -2×3c×7(a+b)

= by formula,

(a-b)²= a²+b²-2ab

: .{3c-7(a+b)}²

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