ALGEBRA G1

 

Given that one of the roots of the equation 3x² + m(x+1) + 5 = 0 is 2, find m.

Solution

Substitute x=2, in the above equation.

3(2)² + m(2+1) + 5 = 0

(3x4) + (m x 3) + 5 = 0

12 + 3m + 5 = 0

3m + 17 = 0

3m = -17

3m = -17

3          3

 

m=^-17/3

Hence m=^-17/8

TRY THIS…………………………..

Given that one of the roots of the equation 4x² + m(x+1) + 10 = 0 is 8, find m.