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Mathematics for IGCSE & O level - Indices 2 (Section 2 - No. 22)

What is the expanded form of (a + b)2?
a2 + b2
a2 + 2ab + b2
a2 - 2ab + b2
a2 + ab + b2

Тайлбар

(a+b)(a+b) = a2 + ab + ab + b2 = a2 + 2ab + b2

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