Q. 155.0( 1 Vote )

# Prove by direct method that for any real numbers x, y if x = y, then x2 = y2.

We have Given for any real number x, y if x=y

To Find: x2=y2

Explanation: Let us Assume

p: x=y where x and y are real number

On squaring both sides we get

x2=y2 : q (Assumption)

Therefore,

P=q

Hence, Proved

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