Solving Polynomial Equations using Technology

Question 1

Which system of equations can be used to find the roots of the equation ?

Revolt · Accepted Answer

StartLayout Enlarged left-brace 1st row y = 4 x Superscript 5 Baseline minus 12 x Superscript 4 Baseline + 6x 2nd row y = 5 x cubed minus 2 x EndLayout

Question 2

The polynomial equation has complex roots . What are the other roots? Use a graphing calculator and a system of equations.

Revolt · Accepted Answer

–2, 2

Question 3

What are the roots of the polynomial equation ? Use a graphing calculator and a system of equations. Round noninteger roots to the nearest hundredth.

Revolt · Accepted Answer

–1.73, 1.73, 2

Question 4

What are the roots of the polynomial equation ? Use a graphing calculator and a system of equations. Round noninteger roots to the nearest hundredth.

Revolt · Accepted Answer

–2.24, 2, 2.24

Question 5

A parabolic listening device is shaped such that the depth of the bowl depends on its radius and can be represented by the curve D(r) = 0.145r2. What is the radius when the depth is 8 inches? Round to the nearest thousandth of an inch.

Revolt · Accepted Answer

7.428 inches

Solving Polynomial Equations using Technology Answers

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