body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Dashboard

McGraw Hill Integrated II, 2012 View details

5. Solving Quadratic Equations by Using the Quadratic Formula

Finish the assignment

Continue to next subchapter

Exercise 8 Page 137

To use the Quadratic Formula identify a, b and c.

3± sqrt(57)/4

Practice makes perfect

We will use the Quadratic Formula to solve the given quadratic equation. ax^2+ bx+ c=0 ⇕ x=- b± sqrt(b^2-4 a c)/2 aWe first need to identify the values of a, b, and c. 2x^2-3x-6=0 ⇕ 2x^2+( - 3)x+( - 6)=0 We see that a= 2, b= - 3, and c= - 6. Let's substitute these values into the Quadratic Formula.

x=- b±sqrt(b^2-4ac)/2a

SubstituteValues

Substitute values

x=- ( - 3)±sqrt(( - 3)^2-4( 2)( - 6))/2( 2)

▼

Solve for x and Simplify

NegNeg

- (- a)=a

x=3±sqrt((- 3)^2-4(2)(- 6))/2(2)

CalcPow

Calculate power

x=3±sqrt(9-4(2)(- 6))/2(2)