Question

Solve with identity
1. ( b - 7 )²

Answer 1

Answer:

( b - 7 )²=b²-14b+49

Step-by-step explanation:

Given

(b-7)²

To solve (b-7)²

Solution:

We know,

$(a-b)^{2}=a^{2} -2ab+b^{2}$

Putting a=b and b=7,

(b-7)²

⇒b²-2.b.7+7²

⇒b²-14b+49

Hence, (b-7)²=b²-14b+49.