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Arada [10]
4 years ago
5

For the function: f(x) = 21 + 2x − 5x2 Find f(3)

Mathematics
1 answer:
allochka39001 [22]4 years ago
6 0
F(3)=-18

You just replace x for three for your equation and then use Ofer of operations to solve it.

So f(3)= 21+ 2(3)-5(3)^2

The exponent goes first: f(3)= 21+ 2(3)-5(9)

Next is multiplication: f(3)= 21+ 6-45

Now add: f(3)= 27-45

Finally subtract: f(3)= -18

Hope this helps!
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