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McGraw Hill Integrated II, 2012 View details

Preparing for Standardized Tests

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Exercise 1 Page 163

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

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. x^2+5x-12=0 ⇕ 1x^2+ 5x+( - 12)=0 We see that a= 1, b= 5, and c= - 12. Let's substitute these values into the Quadratic Formula.

x=- b±sqrt(b^2-4ac)/2a

SubstituteValues

Substitute values

x=- 5±sqrt(5^2-4( 1)( - 12))/2( 1)

▼

Solve for x and Simplify

CalcPow

Calculate power

x=- 5±sqrt(25-4(1)(- 12))/2(1)

IdPropMult

Identity Property of Multiplication

x=- 5±sqrt(25-4(- 12))/2