Question

find if m-1 is a factor of x^2-mx-4.value ofm =?​

Answer 1

Answer:

-1

Step-by-step explanation:

m-1 is a factor of x²-mx-4.

Then m-1 must satisfy the expression that is the the expression will become 0.

Put m-1 in expression

(m-1)²-(m*m-1)-4=0

Expanding

m²+1-2m-m²+1-4=0

2m=-2

m=-1

m=-1