Problema Solution
A 15-foot ladder is leaning against a wall. If the distance from the top of the ladder to the ground is 3 feet more than the distance from the bottom of the ladder to the wall, then what is the distance from the top of the ladder to the ground?
Answer provided by our tutors
x2+(x-3)2 = 152 (x>0)
=> x2 + x2 - 6x + 9 =225
=> 2x2 - 6x - 216 = 0
=> x2 - 3x - 108 = 0
=> x = 12ft