Question

Find the square of:

$i) \: 2a \: + \: b$
$ii) \: 3a \: + \: 7b$


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Answer 1

Step-by-step explanation:

1. (2a+b)²

=(2a)² + 2×2a×b + b²

= 4a²+4ab+b²

2. (3a+7b)²

= (3a)²+2×3a×7b+(7b)²

=9a²+42ab+49b²