Question

if ( x + 1 ) is a factor of ax³ + x² - 2x + 4a - 9. find value of a​

Answer 1

$f(x) = a {x}^{3} + {x}^{2} - 2x + 4a - 9$

x+1=0

x=-1

f(×)is the remainder so it is zero

$0= a {1}^{3} + {1}^{2} + 4 \times 1- 9$

0=a+1+4-9

0=a+5-9

0=a-4

a=4<=Answer

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Answer 2

Answer:

x+1=0

x=-1

f(×)is the remainder so it is zero

0=a+1+4-9

0=a+5-9

0=a-4

a=4<=Answer

Hope it is helpfull :)