

10.3 Quadratic Formula
Presentation
•
Mathematics
•
9th - 12th Grade
•
Medium
+1
Standards-aligned
Taylor Tackett
Used 98+ times
FREE Resource
8 Slides • 12 Questions
1
10.3 Quadratic Formula
ANOTHER way to solve quadratics!

2
Multiple Choice
Which is the general form of a quadratic equation?
y=mx+b
ax2+bx+c=0
(x−a)(x−b)=0
3
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
4
We will need the general form in order to use the quadratic formula
5
Example
−x2−4x+8=0
6
Example
x2+6x=16
7
Multiple Choice
Use the quadratic formula to solve 2x2 + 2x - 12?
x = -2, 3
x = 2, 3
x = 2, -3
x = -2, -3
8
Multiple Choice
Solve using the quadratic formula.
2x2−9x−35=0
x=27, x=−6
x=−25, x=5
x=−73, x=6
x=−25, x=7
9
Multiple Choice
Solve 2x2+7x−15=0
x = -1.5 or 5
No Solution
x = -5 or 1.5
x = 0.7 or 5
10
Example with a Complex Solution
2x2−4x+5=0
11
We will use this to determine how many solutions a quadratic has!
12
13
Multiple Choice
Use the discriminant to determine the number of solutions for: x2−x+2=0
2 real soltuions
2 complex solutions
1 real solution
no solution
14
Multiple Choice
Use the discriminant to determine the number of solutions for: 2x2−3x−2=0
2 real solutions
2 complex solutions
1 real solution
15
Multiple Choice
Use the discriminant to determine the number of solutions for: x2−2x+1=0
2 real solutions
2 complex solutions
1 real solution
16
Writing a Quadratic Equation given the Solutions
Write a quadratic equation that has the solutions x = 4 and x = -7
17
Multiple Choice
Given the zeros , what is the quadratic equation?
y=x2 +6x -8
y=x2 +6x +8
y=x2 -2x -8
y=x2 -2x +8
18
Multiple Choice
Given the zeros, what is the quadratic equation?
y=3x2 +10x +8
y=2x2 ++11x +8
y=3x2 +14x +8
y=2x2 +5x +8
19
Multiple Choice
Write a quadratic function with solutions of
2+3i and 2−3ih(x)=x2−4x−6
p(x)=x2−4x−6
k(x)=x2−4x+13
f(x)=x2+4x+13
20
Poll
What is your favorite way of solving quadratic equations so far?!
Factoring
Square Root Property
Completing the Square
Quadratic Formula
10.3 Quadratic Formula
ANOTHER way to solve quadratics!

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