Quadratic Formula Real Roots

Determine the values of a, b, and c for the quadratic equation:

4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

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

• Get factored form

• Write down: a=1, b=6, c=-13

• Make it equal 0 by subtracting 3 on each side

• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

Determine the value of the discriminant and name the nature of the roots for the following:
x² + 7x + 13
Remember:  b² - 4ac

• 400, 2 real root 

• 0, 1 real root with a multiplicity of 2

• -400, 2 imaginary roots

• -3, 0 real roots

Tags

CCSS.HSA-REI.B.4B

Solutions of a quadratic equation are also called

• roots

• x-intercepts

• zeros

• All of the above

If there are no real solutions, the discriminant is

• zero

• a postive number

• a negative number

• a perfect square

Tags

CCSS.HSA-REI.B.4B

• x = -1 and -3

• x = 1 and 3

• x = 1 and -3

• x = -1 and 3

Tags

CCSS.HSA-REI.B.4B

If there is one solution, the discriminant is . . .

• zero

• a postive number

• a negative number

• a perfect square

Tags

CCSS.HSA-REI.B.4B

Use the quadratic formula to solve 2x² + 2x - 12?

• -2, 3

• 2, 3

• 2, -3

• -2, -3

Tags

CCSS.HSA-REI.B.4B

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7