Question

If M = 5x2 + 7x – 4 and N = -3x2 - 4x + 5, what’s M-N

Answer 1

If M = 5x2 + 7x – 4 and N = -3x2 - 4x + 5, then M-N=
`8 x^(2)+11 x-9`

Explanation:

Given:

`M= 5 x^(2)+17 x-4`

`N=-3 x^(2)-4 x+5`

To find:

M-N=?

Solution:

`M-N=5 x^(2)+7 x-4-(-3 x 2-4 x+5)`

`M-N=5 x^(2)+7 x-4+3 x^(2)+4 x-5`

Rearranging the above equation

`M-N=5 x^(2)+3 x^(2)+7 x+4 x-4-5`

Now solving we get,

M-N=
`8 x^(2)+11 x-9`