`(a x+b y)^2+(b x-a y)^2`

1.	`(a x+b y)^2+(b x-a y)^2`
Answer» Correct Answer - `(a^2+b^2)(x^2+y^2)` Given expression `=a^2x^2+b^2y^2+b^2 x^2+a^2y^2` `=(a^2x^2+b^2x^2)+(a^2y^2+b^2y^2)` .

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