Question

If x +1 is a factor of ax3 + x2

– 2x + 4a -9, find the value of a.​

Answer 1

Answer:

Step-by-step explanation:

x + 1 = 0

x = -1

a(-1)(-1)(-1) + 1 - 2(-1) + 4a - 9 = 0

-a + 2 + 4a - 9 = 0

3a = 9 - 2

3a = 7

a = 7/3

Answer 2

Solution

$= x + 1 = 0 \\ = x = - 1 \\ = a( - 1)..( - 1)..( - 1) + 1 - 2( - 1) + 4a - 9 = 0 \\ = a + 2 + 4a - 9 = 0 \\ = 3a = 9 - 2 \\ = 3a = 7 \\ = a = \frac{7}{5}$

Therefore, the value of a = 7 / 5