Factoring When the Leading Coefficient Is 1

Factor
x² - 9x + 18 

• (x - 6)(x - 3) 

• (x + 6)(x - 3)

• (x - 9)(x - 2)

• (x - 6)(x + 3) 

x² + 8x - 20

• (x + 10) (x - 2)

• (x + 10) (x + 2)

• (x + 5) (x + 4)

• (x + 5) (x - 4)

The factors of x² + 2x - 15 are-

• (x - 5)(x + 1)

• (x - 5)(x + 3)

• (x + 5)(x - 3)

• This is a prime polynomial.

x² + 5x + 6

• (x - 3) (x - 2)

• (x + 3) (x - 2)

• (x + 3) (x + 2)

• (x + 2) (x - 3)

x² - 3x - 40

• (x + 5) (x - 8)

• (x + 8) (x - 5)

• (x + 10) (x - 4)

• (x + 4) (x - 10)

x² - 10x + 21

• (x + 3) (x - 7)

• (x + 7) (x + 3)

• (x - 7) (x - 3)

• (x + 7) (x - 3)

x² - 6x - 40

• (x + 4) (x - 10)

• (x + 5) (x - 8)

• (x + 10) (x - 4)

• (x + 8) (x - 5)

x² + 15x - 100

• (x + 4) (x - 25)

• (x + 25) (x - 4)

• (x + 5) (x - 20)

• (x + 20) (x - 5)

x² + 8x - 9

• (x + 9) (x - 1)

• (x - 9) (x - 1)

• (x + 9) (x + 1)

• (x + 1) (x - 9)

What is the first step in factoring this problem?

• Multiply

• Add the factors of 7

• List the factors of 7

• Factor out the GCF