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

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Answer 1 · 2016-11-13T15:25:16

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 #(-1, -3)# is a solution to the inequality.

Hopefully this helps!