if y= - 3, then find the value of y3 +2y2 - 3y
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since y = - 3
y^3 + 2y^2 - 3y
= ( - 3 )^3 + 2 ( - 3 )^2 - 3 ( - 3 )
= - 27 + 18 + 9
= 0
y^3 + 2y^2 - 3y
= ( - 3 )^3 + 2 ( - 3 )^2 - 3 ( - 3 )
= - 27 + 18 + 9
= 0
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