500(1+x)(x+8%)=168
问题描述:
500(1+x)(x+8%)=168
答
500(1+x)(x+8%)=168
500x+40+500x^2+40x=168
500x^2+540x-128=0
125x^2+135x-32=0
(5x-1)(25x+32)=0
x=1/5 x=-32/25
答
500(1+x)(x+8%)=168
500x+40+500x^2+40x=168
500x^2+540x-128=0
125x^2+135x-32=0
(5x-1)(25x+32)=0
x=1/5 x=-32/25