Chapter 9 Unit TEST: Solving Quadratic Equations Answers
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Alessandro wrote the quadratic equation in standard form. What is the value of c in his new equation?
A
Option
B
Option
C
Option
D
Option
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A rectangle’s width is 2 meters shorter than its length, l. Its area is 168 square meters. Which equation can be used to find the length of the rectangle?
A
l(l – 2) = 168B
l(l + 2) = 168C
2l 2 = 168D
l 2 = 168
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Ramiya is using the quadratic formula to solve a quadratic equation. Her equation is x = after substituting the values of a, b, and c into the formula. Which is Ramiya’s quadratic equation?Quadratic formula: x =
A
0 = x2 + 3x + 2B
0 = x2 – 3x + 2C
0 = 2x2 + 3x + 1D
0 = 2x2 – 3x + 124
The sum of a number and its square is 42. Which equation can be used to find the two numbers for which this is true?
A
x2 + x = 42B
x2 + 2x = 42C
x2 + x + 42 = 0D
x2 + 2x + 42 = 025
Which equations can be used to find the lengths of the legs of the triangle? Select three options.
A
0.5(x)(x + 2) = 24B
x(x + 2) = 24C
x2 + 2x – 24 = 0D
x2 + 2x – 48 = 0E
x2 + (x + 2)2 = 100Did you find these answers helpful?
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