Answers

2015-01-09T18:42:56+05:30
X = -2
5x+x-x³ = 5(-2)+(-2)-(-2)³
            = -10-2-(-8)
            =  -10-2+8
            =  -12+8 = -4
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2015-01-09T19:28:07+05:30
5x+x - x^3
= 6x-x^3
= 6*(-2) - (-2)^3          Substituting value of x=-2
= - 12 -(-8)
= - 12+ 8
= - 4
1 5 1