Square root property: Difference between revisions

Revision as of 10:43, 15 May 2014

The square root property is a method for solving quadratic equations.

First we must convert the quadratic to either the form $ax^2=b$ or $(yx+z)^2=w$ .

$x^2=18$

take the square root of both sides

$x=\pm\sqrt{18}$

so the roots are $\sqrt{18}$ and $-\sqrt{18}$ .

$(3x+4)^2=5$ take the square root of both sides $3x+4=\pm\sqrt{5}$ isolate $x$ $x=\frac{\pm\sqrt{5}-4}{3}$

and those are the roots.

@@ Line 7: / Line 7: @@
 ===First format===
-<math>x^2=18</math> take the square root of both sides
+<math>x^2=18</math>
+take the square root of both sides
 <math>x=\pm\sqrt{18}</math>