Question

Find the value of m if the value of the expression 2x*x*x – 5x*x + mx – 7 is equal to 10, when x = - 1.

Answer 1

Answer:

-17

Step-by-step explanation:

See attached picture.

Hope this Helps!

Answer 2

The value of m is - 24

Step-by-step explanation:

• Given polynomial are

        P(X)= 2 X³ - 5 X² + m X -7      ...1)

• Given that when X = -1 , then P(X) = 10

        Means

        P(-1) =10

• Now come to equation 1), we will get

        P(X)= 2 X³ - 5 X² + m X -7

• Put X = -1 in above equation

        P(-1)= 2 (-1)³ - 5 (-1)² + m (-1) -7

        10  = -2 -5 -m -7

        m = -2 -5 -7 -10

        m = -24 = This will be the value of m