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# Solving Using the Quadratic Formula Worksheet

## Answers

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1
x2 + -7x + 10 = 0
###### Answer
x = 2, 5
2
x2 + -14x + 45 = 0
###### Answer
x = 5, 9
3
0.25x2 + -0.25x + -10.5 = 0
###### Answer
x = -6, 7
4
0.3y2 + 0.15y + -11.7 = 0
###### Answer
y = -6.5, 6
5
10k2 + 200k + 937.5 = 0
###### Answer
k = -12.5, -7.5
6
x^2 - 11x + 30.25
###### Answer
x = 5.5
7
4x2 + 8x + -77 = 0
###### Answer
x = -5.5, 3.5
8
16y2 + -8y + -3 = 0
###### Answer
y = -0.25, 0.75
9
x2 + -1.375x + 0.375 = 0
###### Answer
x = 1, 0.375
10
z2 + 0.6z + -20.16 = 0
z = -4.8, 4.2
11
x2 = 15 + 2x
###### Answer
x = -3, 5
12
k2 + -10k + 35 = 7k + -35
###### Answer
k = 7, 10
13
2x2 + 5 + 20x = 20 + -8x2 + x
x = -2.5, 0.6
14
3 = 16p + -20p2
###### Answer
p = 0.3, 0.5
15
8y = 0.5y2 + 31.5
###### Answer
y = 7, 9
16
2m + m2 + 2.5m + -2.5 = 0
###### Answer
m = -5, 0.5
17
n2 + 7n + n2 + -10 = 5
n = -5, 1.5
18
x2 = 7.84
x = -2.8, 2.8
19
x2 + -3x = 0
###### Answer
x = 0, 3
20
q2 + -7.5q + 25 = -1q2 + -7.5q
###### Answer
q = 2.5, 5
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