Question

if x=-2
5x+x-x(ratiopower3)=?????

Answer 1

x = -2
5x+x-x³ = 5(-2)+(-2)-(-2)³
            = -10-2-(-8)
            =  -10-2+8
            =  -12+8 = -4

Answer 2

5x+x - x^3
= 6x-x^3
= 6*(-2) - (-2)^3          Substituting value of x=-2
= - 12 -(-8)
= - 12+ 8
= - 4