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In each of the following, solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth.$$x^{2}-8 x=4$$

$$4 \pm 2 \sqrt{5},-0.472,8.472$$

Algebra

Chapter 0

Reviewing the Basics

Section 4

The Quadratic Formula and Applications

Equations and Inequalities

Harvey Mudd College

Baylor University

University of Michigan - Ann Arbor

Lectures

01:13

In each of the following, …

01:29

01:07

01:23

02:23

Solve each of the quadrati…

02:13

01:12

02:50

01:04

01:28

02:04

Use the quadratic formula …

02:20

00:49

Solve each equation using …

01:26

01:49

02:52

We first subtract four from both sides of this decree and Egypt camps X squared minus, it adds minus four equals zero. Next, we identify the coefficients A equals one vehicles minus eight and Sequels miners. Next we substitute A B and C with their values into this formula, and the denominator is too, the numerator is eight plus miners. The square root of minus eight squared miners four times one times minus four rich vehicles. Eight plus miners. The square root of 80 over to articles four plus miners two times the square root out far. And if we use a calculator, their approximate values A miner's point for seven to an 8.472

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