Algebra 2/trigonometry 1 Quadratic Equations Worksheet Page 12
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185.3 Solving Quadratic Equations by Finding Square Roots (w/ graphing calculator to check)
(R,E/2)
2
2
Put the equation in the form ��
= �� ���� (�� + ℎ)
= ��
Steps:
(1)
(2)
Solve the equation by taking the square root of both sides of the equation
Don’t forget your positive and negative root ±
(3)
(4)
Check all possible solutions
Directions:
Solve each equation by finding square roots
2
2
4��
− 6 = 42
��
= 81
E1.
P1.
2
2
2(�� − 3)
= 64
2��
+ 7 = 15
E2.
P2.
1
2
2
��
= −81
(�� + 1)
= −5
E3.
P3.
2
2
2
2��
+ 1 = −15
−3(�� − 1)
= 9
E4.
P4.
12 |
P a g e
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