Evaluate the expression 3.14(a2 + ab) when a = 3 and b = 4. (Input decimals only, such as 12.71, as the answer.)
2 answers:
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It's a quadratic equation in disguise. If you let , then
, and we can rewrite the equation as
Solve for however you like; we get
and
.
But we want to solve for , so we have