Question

Using suitable identity, find (x − 2y + 3)^2 - (x + 2y − 3)^2

Answer 1

Step-by-step explanation:

On simplification , we get

(x−2y+3)

2

+(x+2y−3)

2

⟹2(x)

2

+8y

2

+2(3)

2

+2.(x)(−2y)+2.(−2y)(3)+2.(x)(3)+2.(x)(2y)+2.(2y)(−3)+2.(−3)(x)

⟹2x

2

+8y

2

+18−24y

Answer 2

Answer:

On simplification , we get

(x−2y+3)2+(x+2y−3)2 

⟹2(x)2+8y2+2(3)2+2.(x)(−2y)+2.(−2y)(3)+2.(x)(3)+2.(x)(2y)+2.(2y)(−3)+2.(−3)(x)

⟹2x2+8y2+18−24y