Algebra
WORD PROBLEMS
Step 3.
Area of Reduced Pad = (Length of Reduced Pad)(Width of Reduced
Pad)
600
264
(30
2x)(20
2x)
336
600
100x
4x2
Step 4.
Solve this quadratic equation.
4x2 - 100x + 264 = 0
Using the Quadratic Formula, substitute the coefficients for a, b, and c and
solve for x.
x
b ±
b2
4ac
2a
x
( 100) ±
( 100)2
4(4)(264)
2(4)
x
100 ±
10,000
4,224
8
x
100 ±
5,776
8
x
100 ± 76
8
x
100
76
8
,100
76
8
x
176
8
,24
8
x
22,
3
The two roots are x = 22 feet and x = 3 feet. Since x = 22 feet is not
physically meaningful, the answer is x = 3 feet.
Rev. 0
Page 61
MA-02