Modeling with Quadratic Equations — Test

Question 1

Which is a zero of the quadratic function f(x) = 9x2 – 54x – 19?

Revolt · Accepted Answer

x = 6

Question 2

What are the solution(s) of the quadratic equation 98 – x2 = 0?

Revolt · Accepted Answer

x =

Question 3

Which shows the correct substitution of the values a, b, and c from the equation 0 = 4x2 + 2x – 1 into the quadratic formula below?Quadratic formula: x =

Revolt · Accepted Answer

x = StartFraction negative 2 plus or minus StartRoot 2 squared minus 4(4)(negative 1) EndRoot Over 2(4) EndFraction

Question 4

Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x2 – 4 into the quadratic formula?Quadratic formula: x =

Revolt · Accepted Answer

x = StartFraction negative (negative 1) plus or minus StartRoot (negative 1) squared minus 4 (1)(negative 2) EndRoot Over 2(1) EndFraction

Modeling with Quadratic Equations — Test Answers

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