(За +7) (За +7)
,please give solution
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Answer:
9a square +42a+49 urs amswer ......
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(3a+7)(3a+7)
(3a+7)²
(a+b)²=(a)²+2ab+(b)²
(3a+7)²= (3a)²+2×3a×7+(7)²
= 9a²+42a+49
Hope it helps please mark brainliest
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