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(x-y)^2 = __________(a) x^2 + 2xy+y^2(b) x^2 – 2xy+y^2(c) x^2 – y^2(d) x^2 + y^2I had been asked this question in examination.I'm obligated to ask this question of Polynomials in One Variable in division Polynomials of Mathematics – Class 9

Answer»

The correct ANSWER is (B) x^2 – 2xy+y^2

Easy EXPLANATION: We can write (x-y)^2 as (x-y) * (x-y) = x^2-xy-yx + y^2

= x^2-2xy + y^2.



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