f^-1(x)=x/4
P=(35 ×{1−(1+.055)-20}/.055) + 1000 * (1+ .055)-20
-2 - (+3)
2n^2-15n+7=0
2x^2-8x=0
(3x-1)(x-5)=0
(3X-1)(x-5)=0
n^2-11n+18=0