解:设:2-x=a,3+x=b那么a²+b²=15a+b=5∴a²+2ab+b²=25∴2ab=10∴ab=5即(2-x)(3+x)=5
(x-2)^2+(x+3)^2=15则[(x+3)-(x-2)]^2=5^2=25=(x-2)^2+(x+3)^2-2(x-2)(x+3)=15-2(x-2)(x+3)2(x-2)(x+3)=15-25=-10(x-2)(x+3)=-5
自己算
5