-34x+17*17=13*13解得x=60/17
x^2+289-34x+x^2=1692x^2-34x+120=0x^2-17x+60=0(x-12)(x-5)=0x1=12,x2=5
x²+(17-x)²=13²x²+17²-34x+x²=13²2x²-34x=-4X30x²-17x+60=0(x-12)(x-5)=0x1=12x2=5