Question

X+3 is a factor of x cube +6x square + 5x - 12

Answer 1

Yes it is the factor
X+3=0
X=-3
P(X)=x
${x}^{2} + 6 {x}^{2} + 5x - 12 \\ { - 3}^{3} + 6 { - 3}^{2} + 5 \times - 3 - 12 \\ - 27 + 54 - 15 - 12 \\ 27 - 27 \\ 0$

Answer 2

Hey dear,
X+3 is a factor of x³+6x²+5x-12

X+3=0
x=-3
putting x=-3 in eq.

=>(-3)³+6*(-3)²+5*(-3)-12
=> -27+6*9-15-12
=> -27+54-27
=>0

perfectly definitely pure correct answer.
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