Exploring Quadratic Equations with Irrational Solutions

This video tutorial by Kirk Weiler from eMath Instruction covers Unit 9, Lesson 5 on quadratic equations with irrational solutions. It reviews methods for solving quadratic equations, including completing the square and using graphing calculators. The lesson emphasizes understanding irrational solutions and provides exercises to practice these concepts. The video also demonstrates solving equations graphically and highlights the importance of recognizing when solutions are irrational.

What method was NOT reviewed in the introduction for solving quadratic equations?

• Completing the square

• Factoring

• Graphing calculators

• Synthetic division

Tags

CCSS.HSA-REI.B.4B

What is the inverse operation of squaring a number?

• Multiplication

• Addition

• Division

• Square root

Tags

CCSS.8.EE.A.2

If x^2 = 7, what are the solutions for x?

• x = 7

• x = 3.5

• x = ±√7

• x = ±7

Tags

CCSS.8.EE.A.2

What is the simplified form of the square root of 20?

• √10

• 4√5

• 2√5

• 5√2

Why must the solutions to x - 3^2 = 11 be irrational?

• Because 11 is a prime number

• Because adding a rational number to an irrational number results in an irrational number

• Because 3 is a rational number

• Because the square root of 11 is a rational number

Tags

CCSS.8.EE.A.2

What are the decimal approximations of the solutions to x - 3^2 = 11?

• 6.317 and -0.317

• 3.317 and -3.317

• 5.317 and -1.317

• 4.317 and -2.317

Tags

CCSS.8.EE.A.2

What is the purpose of using a graphing calculator in solving quadratic equations?

• To find the exact solutions

• To verify solutions graphically

• To simplify the equations

• To factor the equations

What is the first step in solving a quadratic equation by completing the square?

• Moving the constant term to the other side

• Adding a constant to both sides

• Factoring the equation

• Taking the square root of both sides

Tags

CCSS.HSA-REI.B.4B

What is the simplified form of the square root of 54?

• 3√6

• 2√27

• 6√3

• 9√2

What is the final form of the solution to x^2 - 10x - 13 = 0 using completing the square?

• x = 5 ± 3√2

• x = 5 ± √3

• x = 5 ± 2√3

• x = 5 ± 2√2

Tags

CCSS.HSA-REI.B.4B