Question

if (x-1) is a factor of x² + 2ax - 3a , then find the value of a
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Answer 1

Step-by-step explanation:

If (x+1) is a factor of P(x), then the value of P(x)=0, at x=-1. Put x=-1 in given expression. Therefore the value of a is 1.

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Answer 2

Answer:

Value of a = 1

Step-by-step explanation:

Since x+1 is a factor of the polynomial p(x)=x²−3ax+3a−7

Therefore, by Factor theorem p(−1)=0

⇒(−1)²   −3a(−1)+3a−7=0

⇒1+3a+3a−7=0

⇒a=1