14A Quick Quiz A2

The discriminant is

• aX²  + bX  +  c
• b - 4ac
• b² - 4ac
• b² + 4ac

If the discriminant is positive, then the solution will be

• one real solution

• two real solutions

• no real solutions

• one imaginary solution

____________
For the function above, is the discriminant positive, negative, or zero?

• Positive
• Negative
• Zero
• Not Sure

For the function below, is the discriminant positive, negative, or zero?

___________

y = x² + 4x + 4

• Positive

• Negative

• Zero

• Not Sure

Write this equation x² -6 = x in standard form.

• x² +6x=0

• x² -6x=0

• x² -x -6 =0

• x² +x -6

Solve.

( x + 9 ) ( x - 7 ) = 0

• x² + 2x - 63 = 0

• x = 9 and x = - 7

• x = - 9 and x = 7

• x = 9 and x = 7

Solve by factoring:

n² - 2n = 0

• n = 2 and 0

• n = -2 and 0

• n = 2

• n = 0

What property would you use to solve the following?
(x-3)(x+2)=0

• Commutative Property
• Associative Property
• Zero Product Property
• Inverse Property

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Find two numbers which add to make 6 and multiply to make -13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Solve by factoring: x² - 9x + 20 = 0

• x = -4 and x = -5
• x = 20 and x = -9
• x = 4 and x = 5
• x = -4 and x = 5