Solving Quadratics Quadratic Formula

Solve by using the quadratic formula.

7x² - 26x - 8 = 0

• x = -1 and x = -7/8

• x = 4 and x = -2/7

• x = -4 and x = 2/7

• x = 4 and x = -7/2

Solve using the quadratic formula.

2x² - 9x - 35 = 0

• x = 7/2 and x = -6

• x = -5/2 and x =5

• x = -3/7 and x =6

• x = -5/2 and x = 7

Use the quadratic formula to solve: n² = 9n - 20

• n = 4 and n = -5

• n = -4 and n = 5

• n = -4 and n = -5

• n = 4 and n = 5

What is this formula?

• This is the speed of light formula.

• This is the quadratic formula.

• This is the zero product property.

• This is scary.

Mathematical Equivalence

ON

Fill in quadratic formula

j

h

d

4ac-b^2

a^2

-2a

b

-b^2-4ac

-b

2a

b^2+4ac

b²-4ac

b^2

Tags

CCSS.MATH.CONTENT.HSN.CN.C.7

CCSS.MATH.CONTENT.HSA.SSE.A.1.b

Mathematical Equivalence

ON

Mathematical Equivalence

ON

Solve for x. How can you solve for it on the calculator?

Mathematical Equivalence

ON