Question

How do you subtract the polynomial (3.1x+2.8z) and (4.3x−1.2z)?

Answer 1

Subtract x part and z part as..

$3.1x - 4.3x = - 1.2x$

And

$2.8z - ( - 1.2z) = 2.8z + 1.2z = 4.0z$

Answer

$- 1.2x + 4.0z$