Solving Quadratic Equations - Cool math Algebra Help Lessons

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Coolmath Algebra
Solving Quadratics Lesson 6 - Overview (page 2 of 4)
---- This algebra lesson gives an overview and review of the techniques used to solve quadratic equation: factoring, taking the square root of both sides, the quadratic formula (quadranator).

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METHOD 2: Square Root Trick

*Works great when the middle x term is missing.
Don't forget the !

example:

Solve

get x^2 alone: 4x^2 = 5 gives x^2 = 5/4 which gives sqrt( x^2 ) = +/- sqrt( 5/4 ) = +/- sqrt( 5 ) / sqrt( 4 ) = +/- sqrt( 5 ) / 2

{ -sqrt( 5 ) / 2 , sqrt ( 5 ) / 2 }

YOUR TURN:

Solve

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