Lesson 5: Introduction to the Quadratic Formula Answers
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1
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Which statement is true about the quadratic equation 8x2 − 5x + 3 = 0?
A
The constant term is 8.B
The constant term is −5.C
The leading coefficient is 8.D
The leading coefficient is −5.2
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Which shows the correct substitution of the values a, b, and c from the equation 1 = –2x + 3x2 + 1 into the quadratic formula?Quadratic formula:
A
x = StartFraction negative (negative 2) plus or minus StartRoot (negative 2) squared minus 4 (3)(0) EndRoot Over 2(3) EndFraction
B
x = StartFraction negative (negative 2) plus or minus StartRoot (negative 2) squared minus 4 (3)(2) EndRoot Over 2(3) EndFraction
C
x = StartFraction negative (negative 2) plus or minus StartRoot (negative 2) squared minus 4 (3)(1) EndRoot Over 2(3) EndFraction
D
x = StartFraction negative 3 plus or minus StartRoot 3 squared minus 4 (negative 2)(0) EndRoot Over 2(negative 2) EndFraction
3
A student is deriving the quadratic formula. Her first two steps are shown.Step 1: –c = ax2 + bxStep 2:
A
division property of equalityB
factoring the binomialC
completing the squareD
subtraction property of equalityDid you find these answers helpful?
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