(1)7(m+1)²-14=0
7(m+1)²=14
(m+1)²=2
m+1=±√2
m1=√2-1,m2=-√2-1
(2)x(2x-7)=2x
x(2x-7)-2x=0
x(2x-7-2)=0
x(2x-9)=0
x=0,2x-9=0
x1=0,x2=9/2
不明白可追问,满意请采纳
(1)7(m+1)²-14=0
7(m+1)²=14
(m+1)²=2
m+1=±√2
m1=√2-1,m2=-√2-1
(2)x(2x-7)=2x
x(2x-7)-2x=0
x(2x-7-2)=0
x(2x-9)=0
x=0,2x-9=0
x1=0,x2=9/2
不明白可追问,满意请采纳