Finding Zeros of Polynomials

Find all the factors of f(x)=x³+6x²-25x+18 if you know that (x-1) is a factor. (Do not use graphing calculator)

• (x-1)(x+9)(x-2)

• (x-1)(x-9)(x-2)

• (x-1)(x+6)(x+3)

• (x-1)(x-6)(x+3)

Find all of the factors of 2x³+13x²+17x-12 if one factor is (x+4). (Do not use graphing calculator)

• (2x-1)(x-3)(x=4)

• (2x+3)(x-1)(x+4)

• (2x-1)(x+3)(x+4)

• (2x+1)(x-3)(x+4)

Find all of the zeros of 3x³+10x²-23x-10 if one factor is (x+1). (Do not use graphing calculator)

• x=-1, 5, -2/3

• x=-1, -5, 2/3

• x=-1, 10, -1/2

• x=-1, 5, -3/2

Use your graphing calculator to find all of the solutions of the function f(x)=2x³-8x²-34x+120

• -3, 2, 5

• 6, -5, 3

• 3, -4, 5

Use your graphing calculator to find all of the x-intercepts of f(x)=x³-5x²-14x

• -3, 0, 7

• -2, 0, 7

• -2, 7

• 6, 0, -2

Tags

CCSS.HSF-IF.C.7C

Find all of the x-intercepts of the equation f(x)=x³-4x²-20x+48 if one zero is x=2 (Do not use graphing calculator)

• x=2, -4, 6

• x=2, 4, -6

• x=2, -12, 2

• x=2, -2, 12