given the function f(x)=4xto the second power-3x+8, find the value of f (-1)

Question

0

557

2

Guest Mar 2, 2015

+118723

+5

Best Answer

$$\\f(x)=4x^2-3x+8\\\\
f(-1)=4*(-1)^2-3*(-1)+8\\\\
f(-1)=4*(+1)+3+8\\\\
f(-1)=4+3+8\\\\
f(-1)=15\\\\$$

Melody Mar 3, 2015

Melody · Answer 1 · 2015-03-03T03:34:22

$$\\f(x)=4x^2-3x+8\\\\
f(-1)=4*(-1)^2-3*(-1)+8\\\\
f(-1)=4*(+1)+3+8\\\\
f(-1)=4+3+8\\\\
f(-1)=15\\\\$$

.

Guest · Answer 2 · 2015-03-02T10:01:02

15

Either graph the equation or substitute -1 for x.