3分之5x-1-x>1
问题描述:
3分之5x-1-x>1
x²-(x+2)(x-2)-(x-3)²,解方程x(x+2)-(x-3)(x+4)=5要过程
答
3分之(5x-1)-x>1
5x-1-3x>3
2x>4
x>2
x(x+2)-(x-3)(x+4)=5
x^2+2x-(x^2+x-12)=5
x+12=5
x=-7