Question

4. The polynomial x² + 2x² – 5ax + 7 when divided by (x + 1)) leaves a reminder
R, and the polynomial xº + ax? - 12x+6 are divided by (x - 2) leaves
remainder R. If R-R= 20, find a.​

Answer 1

Answer:

Please see the attachment

Answer 2

Step-by-step explanation:

x+1=0,x=-1

x^2+2x^2-5ax+7

-1^2+2×-1^2-5 a×-1+7

1+2-5-a+7

3-5+7-a

-2+7-a

5-a=0

a=5

x-2=0

x=2

2°+a×2-12×2-6. (a°=1)

1+2a- 24-6

1+2a-18

1-18+2a

-17+2a=0

2a=17

a=17/2

R=-10

-10+-10=20