Answer:
L = 4πa²b
Step-by-step explanation:
Multiply both sides by 4πa²b.
x +5
x² + 10x + 25 = x² + 5x + 5x + 5*5
= x(x + 5) + 5(x + 5)
= (x + 5) (x +5)
0
the answer is 12
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