c. 9 a^{2}-42 a b+49 b^{2}

Question

Accepted Answer

Step:1 ：Given the expression: (9a^2 - 42ab + 49b^2)Step:2 ：Factorize the expression: ((3a - 7b)^2)Step:3 ：(boxed{(3a - 7b)^2}) is the simplified expression.

Answer

Step: 1 ：Given the expression: (9a^2 - 42ab + 49b^2)Step: 2 ：Factorize the expression: ((3a - 7b)^2)Step: 3 ：(boxed{(3a - 7b)^2}) is the simplified expression.

c. $9 a^{2}-42 a b+49 b^{2}$

Answer

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