Unit 2 Test - Part A

Use the graph to determine the solutions.

• -1 and -3
• 1 and -3
• 1 and 3
• -1 and 3

The solutions of a quadratic equation are known as the _____.

• Vertices
• Roots
• Squares
• Formulas

What are the x- intercepts?

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

How many solutions does this graph have?

• one
• two
• no solutions
• cannot be determined

Factor and solve:

z² − 14z + 45 = 0

• z = 1, 45

• z = −1, 45

• z = −5, 9

• z = 5, 9

Convert x²+6x+9 to factored form and identify the solution.

• (x+3)(x+3); x=-3
• (x+4)(x+5); x=-4, -5
• (x-3)(x-3); x=3
• Not factorable

Solve using square roots.

• ±81
• ±9
• ±3
• No real solution

Factor completely:  3x² + 18x +15

• 3(x² + 6x + 5)
• (x + 5)(x + 1)
• 3(x + 5)(x + 1)
• Prime

• A.

  Divide both sides f the equation by 3.

• B.

  Take the square root of both sides of the equation.

• C.

  Subtract 12 from both sides of the equation.

• D.

  Find two values with a sum of 5 and a product of 12.

• A.

  Yes, she factored correctly and then used the zero product property

• B.

  No, she didn't factor correctly so the rest of her work is wrong.

• C.

  No, she did not set the equation equal to zero before factoring.

• D.

  Yes, she answered it correctly.