Question

初中数学解方程x(X-5)=6

求解 两个根
谢谢
十字想乘法怎么运用

Answer 1

x(X-5)=6
x²-5x=6
x²-5x+2.5²=6+2.5²
(x-2.5)²=12.25
x-2.5=±3.5
x1=6 x2=-1

或者用十字想乘法
分解成
(x-6)(x+1)=0
x-6=0 x+1=0
x1=6 x2=-1

Answer 2

X(X-5)=6
X^2-5X-6=0
(X-6)(X+1)=0
X1=6 X2=-1

X^2-5x+6=0
(X-2）(X-3)=0
X1=2 X2=3

Answer 3

X(X-5)=6
X^2-5X-6=0
(X-6)(X+1)=0
X-6=0 X+1=0
X1=6 X2=-1

Answer 4

x（x-5）=6
x*x-5x=6
x*x-5x-6=0
(x-6)(x+1)=0
x1=6 x2=-1

Answer 5

－1和6