Question

3. Expand :
(i) (x-2y+2)²​

Answer 1

Step-by-step explanation:

(a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ac

(x - 2y + 2)²

= x² + (-2y)² + (2)² + 2(x)(-2y) + 2(-2y)(2) + 2(x)(2)

= x² + 4y² + 4 - 4xy - 8y + 4x

= x² + 4y² + 4x - 8y - 4xy + 4

Answer 2

Given: (x-2y+2)² Expand: (x-2y+2)²= {(x-2y) +2}²= x² -4xy+4y²+4+2×(x-2y)×2= x² +4y² -4xy+4+4x-8y