Question

x(2x-7)=2x

x(2x-7)=49/8
(2x-1)²=(3x+1)²
（x+1）（x-1）=2√2x

Answer 1

当x=0时 等式成立
当x不等于0时；x(2x-7)=2x
2x-7=2
2x=7+2
2x=9
x=4.5
所以x=0或x=4.5
希望对你有帮助

Answer 2

当x=0时 等式成立
当x不等于0时；x(2x-7)=2x
2x-7=2
2x=7+2
2x=9
x=4.5
所以x=0或x=4.5
希望对你有帮助

Answer 3

(1) x(2x-7)=2x 2x²-9x=0 x(2x-9)=0 x1=9/2,x2=0
(2) x(2x-7)=49/8 2x²-7x-49/8=0 16x²-56x-49=0 x1=7-7√2，x2=7+7√2
(3)2x-1=±(3x+1) x1=0,x2=-2
(4)(x+1)(x-1)=2√2x x²-2√x-1=0 (x-√2)²=3 x1=√2+√3,x2=√2-√3

Answer 4

x(2x-7)=2x
2x²-7x=2x
2x²-9x=0
x(2x-9)=0
x=0或x=4.5

Answer 5

x=0
x=4.5