Solving by Using the Quadratic Formula

Presentation

•

Mathematics

•

9th Grade

•

Hard

•

CCSS

HSA-REI.B.4B, HSF-IF.C.7A

Standards-aligned

Carson Costa

Used 30+ times

FREE Resource

6 Slides • 9 Questions

Solving by Using the Quadratic Formula

By Carson Costa

Poll

Chocolate, Vanilla, or Strawberry?

Chocolate

Vanilla

Strawberry

Axis of symmetry

Vertex

y-intercept

how many solutions are there?

what are the solutions?

Using the graph, identify the:

Multiple Choice

Which of these is a solution to the graph?

-1

-2

Multiple Choice

Which of these is NOT another term for "solution" when we're talking about quadratics?

y-intercept

zero

root

x-intercept

The solutions of a quadratic equation, where a is not equal to zero, are given by the Quadratic Formula.

Plug in a, b, and c, and then solve. (Follow the Order of Operations!)

Quadratic Formula

x²- 12x = -20

Multiple Choice

Solve using the quadratic formula :

x² - 7x + 12 = 0

x = 3, -4

x = -3, 4

x = 3, 4

x = -3, -4

Multiple Choice

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

Multiple Choice

Solve 8x² - 6x + 1 = 0

No Solution

0 or 1

-0.5 or -0.25

0.25 or 0.5

Multiple Choice

The quadratic equation can be used to solve quadratic equations that cannot be factored.

True

False

Discriminant

The discriminant can be used to determine the number of solutions

4x²- 5x = -3

Multiple Choice

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

Positive

Negative

Zero

Not Sure

Multiple Choice

What is the discriminant of -2x² − x − 1 = 0

-7

none of these

Solving by Using the Quadratic Formula

By Carson Costa

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