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3.14(a2 + ab) when a = 4 and b = 2.
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3.14(a2 + ab) when a = 4 and b = 2.

User Bookthief
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just replace a with 4 and b with 2 and your equation looks like
3.14 (4×2+4×2)
solve within the parenthesis first
3.14 (8+8)
3.14 (16) =50.24
User Tumbledown
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