Answer
4 ft by 6 ft
Work Step by Step
$x*(x+2)=24$
$x^2+2x=24$
$x^2+2x-24=24-24$
$x^2+2x-24=0$
$(x+6)(x-4)=0$
$x+6 = 0$
$x+6-6 = 0-6$
$x = -6$
$x-4=0$
$x-4+4 =0+4$
$x = 4$
We can't have a negative length, so $x\ne-6$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-4 Factoring to Solve Quadratic Equations - Practice and Problem-Solving Exercises - Page 558: 27
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