Question

If (x + 1) is a factor of x²− 3ax +3a- 7, then the value of a is:
a)1
b)-1
c)0
d)-​2

Answer 1

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Answer 2

Answer: (A) 1

Step-by-step explanation:

Find the zero of the polynomial ; -1

Replace the variable 'x' with this value.

(-1)^2 - 3(-1)a + 3a - 7

We know that (x+1) is a factor, hence, the answer for the equation is bound to be zero.

:: 1 + 3a + 3a - 7 = 0

:: 6a - 6 = 0

:: 6a = 6

::a = 1