Question

方程2x(3x-5)-(2x-3)(3x+4)=3(x+4)的解是多少？

方程2x(3x-5)-(2x-3)(3x+4)=3(x+4)的解是多少？

Answer 1

先去括号得6x^2-10x-6x^2-8x+9x+12=3x+12-12x=0x=0

Answer 2

X=0 全乘进去就行了

Answer 3

先去括号得6x^2-10x-6x^2-8x+9x+12=3x+12
-12x=0
x=0

Answer 4

2x(3x-5)-(2x-3)(3x+4)=3(x+4)(6x^2-10x)-(6x^2-x-12)=3x+12-9x+12=3x+12x=0