Question

(2x + 3y)² + (2x - 3y)²​

Answer 1

Answer:

8x^2+18y^2

Step-by-step explanation:

(2x+3y)^2=4x^2+2*2x*3y+9y^2

= (4x^2+12xy+9y^2)

(2x-3y)^2=4x^2-2*2x*3y+9y^2

(4x^2-12xy+9y^2)

now solving,

(4x^2+12xy+9y^2)+(4x^2-12xy+9y^2)

= 8x^2+18y^2

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