# How do you determine if (-1,-3) is a solution to y>=-5x^4+7x^3+8?

Nov 13, 2016

Substitute the point in the inequality. If the end result makes sense mathematically, it is a solution.

-3 ≥^? -5(-1)^4 + 7(-1)^3 + 8

-3 ≥^? -5(1) + 7(-1) + 8

-3 ≥^? -5 - 7 + 8

-3 ≥ -4" "color(green)(√)

So, the point $\left(- 1 , - 3\right)$ is a solution to the inequality.

Hopefully this helps!