问题
解答题
解方程:
(1)x(x-3)-4(3-x)=0
(2)x2-4x-9996=0.
答案
(1)x(x-3)-4(3-x)=0
x(x-3)+4(x-3)=0,
(x-3)(x+4)=0,
解得:x1=3,x2=-4;
(2)x2-4x-9996=0
x2-4x+4=9996+4,
(x-2)2=10000,
解得:x1=102,x2=-98.
解方程:
(1)x(x-3)-4(3-x)=0
(2)x2-4x-9996=0.
(1)x(x-3)-4(3-x)=0
x(x-3)+4(x-3)=0,
(x-3)(x+4)=0,
解得:x1=3,x2=-4;
(2)x2-4x-9996=0
x2-4x+4=9996+4,
(x-2)2=10000,
解得:x1=102,x2=-98.