Question

Evaluate : (b-7) ^2​

Answer 1

Step-by-step explanation:

(a-b)²=a²-2ab+b²

(b-7)²

a=b

b=7

(b-7)²=b²-14b+49

Answer 2

Answer:

$Since, \ {(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab \\ = > {(b - 7)}^{2} = {b}^{2} + {7}^{2} - 2 \times b \times 7 \\ = {b}^{2} + 49 - 14b$

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