Question

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

Answer 1

Answer:

If M = 5x2 + 7x – 4 and N = -3x2 - 4x + 5, then M-N= $8 x^{2}+11 x-9$

Step-by-step 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=$8 x^{2}+11 x-9$