x*x-(x-2)*(x-5)=60
问题描述:
x*x-(x-2)*(x-5)=60
答
x^2-x^2+7x-10=60
7x-10=60
x=10
x*x-(x-2)*(x-5)=60
x^2-x^2+7x-10=60
7x-10=60
x=10