Question from beth, a student:

Given q(x) = 7xsquared + 9, find q(-7)

This is the way the question is written. On 7x the x is squared. I didn't know how to make the 2 up above the x.

These were the choices I had for the answers to this problem 1.) 343 2.) -40 3.) 334 4.) -89 5.) 352

Hi Beth,

Suppose p(x) = 5x^{2} + 2x + 7 then

p(-4) = 5 × (-4)^{2} + 2 × (-4) + 7 = 5 × 16 + (-8) + 7 = 80 - 8 + 7 = 79

Now can you find q(-7) is q(x) = 7x^{2} + 9?

Penny