Question

x除以4 的平方+64-x除以4 的平方=160 求x

Answer 1

(x/4)^2+[(64-x)/4]^2=160

(x/4)^2+[16-x/4]^2=160

(x/4)^2+256-8x+(x/4)^2=160

2(x/4)^2-8x+96=0

x^2-64x+768=0

(x-16)*(x-48)=0

x=16或者x=48