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

10. Roots and Zeros

Finish the assignment

Continue to next subchapter

Exercise 1 Page 77

Make sure you write all the terms on the left-hand side of the equation and simplify as much as possible before using the Quadratic Formula.

Roots: x=5, x=- 2
Number and Type of Roots: two real roots

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 a We first need to identify the values of a, b, and c. x^2-3x-10=0 ⇕ 1x^2+( - 3)x+( - 10)=0 We see that a= 1, b= - 3, and c= - 10. 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( 1)( - 10))/2( 1)

▼

Simplify

NegNeg

- (- a)=a

x=3±sqrt((- 3)^2-4(1)(- 10))/2(1)

CalcPow

Calculate power

x=3±sqrt(9-4(1)(- 10))/2(1)