Solving Quadratics in Factored Forms

For f(x) = (x-3)(x+4), what are the coordinates of the y-intercept?

• (3,0) and (4,0)

• (0,3) and (0,4)

• (0,-12)

• (-12,0)

Find the vertex of

f(x) = -(x+6)(x-2)

• (-2, 16)

• (2, 0)

• (2, 4)

• (-2, 4)

• x+8

• x-8

• -8 ; 8

• x-16

• x+4

• 16 ; -4

• x+32

• x-32

• 32 ; -32

• x-60

Fill in the blanks to complete the solutions by factoring. (x​ ​ (a)   )(x​ (b)   ) = 0 Answers: x = ​ (c)   x =​ (d)  

• + 15

• + 1

• + 3

• + 5

• - 3

• - 5

• + 2

• + 8

• -15

• -1

Match each quadratic to it's factored form.

• (-100)

  5x² + 21x - 20 = 0

• (x + 25)(x - 4) = 0

• (x + 25/5)(x - 4/5) = 0

• (x + 5)(5x - 4) = 0

• x = -5

  x = 4/5

Can you use the Zero Product Property here?

• Yes, since we can set each factor equal to 1

• Yes, because the product of two factors equal each halved

• No, because 3x + 5 can never equal 1

• No, because the product of the factors does not equal Zero.