Let f(x)=9x^2+6x-8, find f(-7)

f(x) = 9x^2 + 6x - 8

f(-7) = 9(-7)^2 + 6(-7) - 8
= 441 - 42 - 8
= 391

Much appreciated!!!

To find f(-7) using the given function f(x)=9x^2+6x-8, substitute -7 in place of x:

f(-7) = 9(-7)^2 + 6(-7) - 8

Start by simplifying the exponent:
f(-7) = 9(49) - 42 - 8

Multiply and subtract:
f(-7) = 441 - 42 - 8

Combine like terms:
f(-7) = 391 - 8

Finally, subtract:
f(-7) = 383

Therefore, f(-7) = 383.