Question

Evaluate the following using the suitable identity
a) (x + 2)²
b) (y - 8)²
​

Answer 1

(a)(x+2)²=x+4

(b)(y-8)²=y-64

Answer 2

Answer:

a) (x + 2)² = x2 + 4x + 4

b) (y - 8)² = y2 - 16y +64

Step-by-step explanation:

(a+b)2 = a2 + b2 + 2ab

(a-b)2 = a2 + b2 - 2ab

(a) (x+2)2 = x2 + 2*2 + 2(x)(2)

= x2 + 4 +4x

= x2 + 4x + 4

(b) (y-8)2 = y2 + 8*2 - 2(y)(8)

= y2 + 64 -16y

= y2 - 16y +64