Cool math fractal

math image

math image

pre-algebra help lessonsalgebra help lessonsprecalculus / calculus help lessonsmath anxiety survival guidegeometry math artmath and jigsaw puzzlesCoolmath booksother math stuff
math help lessonsmath practice problemsmath gamesmath dictionarygeometry trigonometry reference area
teacher's areaparent's areaCoolmath 4 kidsSpike's Game ZoneFinance FREAKTotally Stressed OutScience Monster
Coolmath Algebra
Solving Quadratic Equations Lesson 4 - The Square Root Trick  
(page 4 of 4)
---- This algebra lesson explains how to solve quadratic equations by taking the square root of both sides.

math image
Now available: Coolmath Algebra books! Part 1, Part 2 and Part 3 covering the Algebra you need from Algebra 1 through Precalculus Algebra (Beginning Algebra through College Algebra)

other Coolmath Books: Coolmath Precalculus Review (the math you really need to survive Calculus 1) and Math Survival Guide (How to conquer math and deal with math anxiety)
line
Graphing Calculator Scientific Calculator << a new window will open for these
line

TRY IT:

Solve  a^2 - 3 = 0

Here's a harder one:

Solve   

Get the  x^2 alone...  which will take a little more work:

25x^2 - 7 = 0 ... add 7 to both sides, which gives 25x^2 = 7 ... divide both sides by 25, which gives x^2 = 7/25 ... take the square root of both sides, which gives sqrt( x^2 ) = +/- sqrt( 7/25 ) which gives x = +/- sqrt( 7/25 ) = +/- sqrt( 7 ) / sqrt( 25 ) = +/- sqrt( 7 ) / 5 

{ - sqrt( 7 ) / 5 , sqrt( 7 ) / 5 }

YOUR TURN:

Solve  8x^2 - 6 = 0

 The printing and distribution and/or downloading of these lessons is strictly prohibited.
line
Graphing Calculator Scientific Calculator << a new window will open for these
line

.....:::::::::::::::  HELP SUPPORT COOLMATH  :::::::::::::::.....
:::::::  link to us   :::::::   advertise with us  :::::::  why we have ads  :::::::

Thanks for visiting Coolmath.com
© 1997-2010 Coolmath.com, Inc.