Posted by Jay on Thursday, April 26, 2012 at 11:36pm.
4 k ( k + 13 ) = 13
4 k * k + 4 k * 13 = 13
4 k ^ 2 + 52 k = 13
In google type:
quadratic equation online
When you see list of results click on:
Free Online Quadratic Equation Solver:Solve by Quadratic Formula
When page be open in rectangle type:
4 k ^ 2 + 52 k = 13
and click option: solve it
You will see solution step-by step
P.S.
( 1 / 8 ) ( - 52 )
= 1 * ( - 52 ) / 8 =
- 52 / 8 =
- 13 * 4 / ( 2 * 4 ) = - 13 / 2
( 1 / 8 ) 4 sqrt ( 182 ) =
4 sqrt ( 182 ) / 8 =
( 4 / 8 ) sqrt ( 182 ) =
( 1 / 2 ) sqrt ( 182 ) =
( 1 / 2 ) sqrt ( 4 * 91 / 2 ) =
( 1 / 2 ) sqrt ( 4 ) sqrt ( 91 / 2 ) =
( 1 / 2 ) * 2 * sqrt ( 91 / 2 ) =
1 * sqrt ( 91 / 2 ) =
sqrt ( 91 / 2 )
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