Solving Quadratics using the Null factor law -UPDATED

What is the first step in solving

(x + 2)(x - 3) = 0 ?

• Plug in zero for x

• Solve for x

• FOIL

• Set each bracket equal to zero

Solve and find your x-intercepts:
0=x(x - 6)

• x=0 and x=-6
• x=1 and x=-6
• x=0 and x=6
• x=6

Solve for the values of x:
(2x - 1)(x + 4) = 0

• { 1/2, -4 }
•  { 1/2, 4 }
• { 2, -4 }
• { -2, 4 }

Tags

CCSS.HSA-REI.B.4B

What are the x-intercepts?
(x+5)(x-2)=0

• x=-5 or x=2
• x=5 or x=2
• x=5 or x=-2
• x=-5 or x=-2

Solve for the values of x:
(2x + 5)(5x - 2) = 0

• x = -5/2, x =  -2/5
• x = -5/2, x = 2/5
• x = 5/2, x = 2/5
• x = 5/2, x =  -2/5

What is the factored form of the quadratic graphed?

• y = (x + 2)(x + 4)
• y = (x - 2)(x - 4)
• y = (x - 3)(x - 1)
• y = (x + 3)(x - 1)

The graph shown comes from which equation?

• y = (x + 4)(2x - 1)
• y = (x - 4)(2x + 1)
• y = (x - 4)(x + 1)
• y = (x + 4)(x - .5)

True or false:
The solution, root, x-intercept, and zero of a problem are all the same thing?

• True
• False, because the solution and root are the same but the x-intercept and zero are different
• False, because the x-intercept and root are the same but the zero and solution are different
• False, they are all different

Tags

CCSS.HSF-IF.C.7A

Solve (x+3)(x-2)

• x= -2 or x = 3
• x= -3 or x = -2
• x= -3 or x = 2
• x= 3 or x =  2

Solve (x-2)(3x+1)

• x=2 or -1
• x= -2 or 1
• x= 2 or -3
• x=2 or -1/3