Question

(m-1)x2+4x+2m=0

Answer 1

\(\left(m-1\right)\times2+4x+2m=0\)

\(m.2-1.2+4x+2m=0\)

\(4m-2+4x=0\)

\(4m+4x=0+2=2\)

\(m=1,5;x=-1\)

Answer 2

(m-1)x2+4x+2m=0

m.2-1.2+4x+2m=0

4m-2+4x=0

4m+4x=0+2=2

m=1,5;x=-1

là đúng.

Answer 3

( M - 1 ) x 2 - 4x + 2m = 0

m.2 - 1.2 + 4x + 2m = 0

4m - 2 + 4x = 0 

4m + 4x = 0 + 2 = 2

m = 1,5 : x = -1

~~~~~~~~~~~~~~~~~~~~~~~~~~~~ chúc bn học giỏi ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~