Tuesday

March 3, 2015

March 3, 2015

Posted by **Melinda** on Friday, December 9, 2011 at 1:23am.

y=-6(x+7)^4 + 5

0=-6(x+7)^4 + 5

-5=6(x+7)^4

-5/6 =(x+7)^4

There are no x-intercepts??

- precalculus -
**Steve**, Friday, December 9, 2011 at 11:39amSince it's a parabola opening downward, and is shifted up 5 units, you know that it will have two x-intercepts. So, what went wrong?

You lost a "-" sign after the 2nd line.

-5 = -6(x+7)^4

5/6 = (x+7)^4

±(5/6)^(1/4) = x+7

x = -7 ±(5/6)^(1/4) = -7 ± .955

**Answer this Question**

**Related Questions**

Precalc - Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5...

math - round result to two decimal places...the answer i have is: 7.023 so two ...

precalculus - Help appreciated~ 1.Use the quadratic formula to determine when f(...

physics - A 4.90 kg particle moves along the x axis. Its position varies with ...

Math Problem (please help) - Consider the following function. g(x) = 6x^4 −...

PreCalculus - I'm trying to find the x-intercepts of a polynomial function = 4x^...

math - Suppose that x is normally distributed with a mean of 10 and a standard ...

Calc - 1. Differentiae each function a) Y=-3x^2+5x-4 b) F(x) = 6/x-3/x^2 c) F(x...

math calculus - The marginal cost of a product is modeled by dC/dx= 16/cube root...

math calculus (please help me) - The marginal cost of a product is modeled by dC...