Solving Quadratic Equations

What are the zeros?

• x= 0 and x= -4
• x= 0 and x= 4
• y= 0
• x= 2

What is another word for zeros?

• y-intercepts
• roots
• vertex
• axis of symmetry

How many zeros does this parabola have? 

• 3
• 2
• 0
• 1

What are the x-intercept/s of the function? 

• (3,0)
• (-3,0)
• (9,0) & (-9,0)
• (-3, 0) & (3, 0)

True or false:
The solutions, roots, x-intercepts, and zeros of a quadratic equation 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

9k² = 225

• 4
• 4, -4
• 25, -25
• -5, 5

What is the vertex of the parabola: y=2(x-3)²+4

• (3,4)
• (-3,4)
• (3, -4)
• (-3,-4)

Find the zeros of the quadratic equation y=4(x+9)²-36

• x=-9+√6 & x=-9-√6
• x=3 & x=-3
• x=-6 & x=-12
• so solution

Solve by completing the square.
x² + 4x= 12

• x = 2 and -2
• x = -6 and 2
• x = 6 and -2
• x = 1 and -1

ax²+bx+c=0  is the standard form of a quadratic equation.

• True
• False