Question

if x+3 is one of the factors x³+2x-MX-18,then m=............​

Answer 1

Answer:

The value of m is 17

Step-by-step explanation:

X + 3 = 0

X = - 3

• x³ + 2x - mx - 18 = 0
• put X = -3
• (-3)³ + 2(-3) - m(-3) - 18 = 0
• -27 - 6 + 3m - 18 = 0
• - 51 + 3m = 0
• 3m = 51
• m = 51 / 3
• m = 17

Answer 2

Step-by-step explanation:

p(x)=x³+2x-MX-18=0

gn x+3 is one of factor

p(-3)=(-3)³+2(-3)-m(-3)-18

=-27-6+3m-18

=-51+3m

p(-3)=0

-51+3m=0

3m=51

m=51/3

m=17