find the of a for which (x+1)is a
fraction of the
polynomial ax3+x2-2x + 40-90
Answers
Answered by
0
Answer:
a = - 47
Step-by-step explanation:
Polynomial = ax³ + x² - 2x + 40 - 90
= ax³ + x² - 2x - 50
factor = x + 1
x = -1
Put the value of x -1 in the polynomial
If x + 1 is a factor of ax³ + x² - 2x - 50 then when we put the value of x -1 it must be equal to 0.
ax³ + x² - 2x - 50 = 0
a ( -1 )³ + ( -1 )² - 2 × ( -1 ) - 50 = 0
-a + 1 + 2 = 50
-a + 3 = 50
-a = 50 - 3
-a = 47
a = - 47
Similar questions