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(2x + 7) {?}^(2) ​
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(2x + 7) {?}^(2)
​

User Amar Gore
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1 Answer

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Answer:

Explanation:

hello : by idetity : (a+b)² = a²+b²+2ab

in this exercice : a = 2x and b = 7

(2x+7)² =(2x)²+7²+2(2x)(7)

(2x+7)² =4x² +28x +49

User Kedar Parikh
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