Find each solution using long division. Show your work.
Show that x + 1 is NOT a factor of...
2x^3 + x^2 - 11x - 30.
Show that x - 3 IS a factor of 2x^3 - 11x^2 - 11x^2 + 12x + 9.
2 answers
Just do long division like you would for anything else. Look at the remainder in the quotient after you divide the divisor into the dividend.
P(-1) -2 +1 +11 +30
P(-1) =40
P(-1) Is not 0
so x+1 is not a factor the question.
P(3) 54 -99 -99 +36 + 9
P(3) =-99
x-3 is NOT a factor of the 2nd question.
P(-1) =40
P(-1) Is not 0
so x+1 is not a factor the question.
P(3) 54 -99 -99 +36 + 9
P(3) =-99
x-3 is NOT a factor of the 2nd question.
1 answer