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Mathematics for IGCSE & O level - Indices 2 (Section 2 - No. 22)
What is the expanded form of (a + b)
2
?
a
2
+ b
2
a
2
+ 2ab + b
2
a
2
- 2ab + b
2
a
2
+ ab + b
2
Explanation
(a+b)(a+b) = a
2
+ ab + ab + b
2
= a
2
+ 2ab + b
2
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