Difference between revisions of "Square root property"

Latest revision as of 22:55, 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.

Revision as of 22:55, 15 May 2014 (view source) Hwl0304 (talk \| contribs) (→‎Second format) ← Older edit		Latest revision as of 22:55, 15 May 2014 (view source) Hwl0304 (talk \| contribs) (→‎Method)
Line 26:		Line 26:

	<math>x=\frac{\pm\sqrt{5}-4}{3}</math>		<math>x=\frac{\pm\sqrt{5}-4}{3}</math>
		+
		+
		+
		+	and those are the roots.