若1/2x³=4,则x=________;若(x-2)²=5,则x=________.
若1/2x³=4,则x=________;若(x-2)²=5,则x=________.
1.若x^2+3x-1=0,则x-3/3x^2-6x÷(x+2 - 5/x-2)=________.
急要!初一数学!若3的2x-1次方=x=________,若3的x次方=1/27,则x=________.
若2x-y=2y-x=15,则x-y=________.
若代数式2x²+3x-1=2,则代数式6x²+9x-5=________
已知(3x-2y+1)²与4x-3y-3互为相反数,则x=________,y=________.
若(4x-3)的平方+ 2y+1的绝对值=0,则x+2y=________.
1.已知f(x-1)=x^2+x,则f(2)=______,f(x+2)=________
若2x=10-3x,则2x+____=10,是根据等式性质________
f(x-1/x+1)=x,则f(x)=________
已知根号(x-2)²=2-x,则x的取值范围是________.
要使x(x+a)+3x-2b=x^2+5x+4成立,则a=_______,b=________