Question

Expand using identity: ( + 7)²​

Answer 1

Step-by-step explanation:

(b−7)

(b−7) 2

(b−7) 2

(b−7) 2 =(b−7)(b−7)

(b−7) 2 =(b−7)(b−7)=b(b−7)−7(b−7)

(b−7) 2 =(b−7)(b−7)=b(b−7)−7(b−7)=b ²−7b−7b+49

−7b−7b+49=b²−14b+49

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