解方程 x(x-2)+15=(x+3)(x-2)
问题描述:
解方程 x(x-2)+15=(x+3)(x-2)
答
x2-2x+15=x2-2x+3x-6
x
答
(1) X²-2X+15=X²+X-6
X²-2X+15-X²-X+6=0
-3X+21=0
-3X=-21
X=7
(
答
X2-2X+15=X2+X-6
-3X=-24
X=8
答
7
答
x(x-2)+15=(x+3)(x-2)
x²-2x+15=x²+x-6
-3x=-21
x=7
答
x^2-2x+15=x^2+x-6
-3x=-21
x=7
答
x2+x-6=x2-2x+15
3x=21
x=7