Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 23)

Which is the simplified form of (x1/2+y1/2)2?
x + y
x + y + 2x1/2y1/2
x2 + y2
x + y + xy

Explanation

(x1/2 + y1/2)2 = x1/2*2 + 2x1/2y1/2 + y1/2*2 = x + 2x1/2y1/2 + y.

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