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

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Answer 1 · 2017-07-05T19:58:51

See a solution process below:

We can write this problem as the expression:

$(3.1x + 2.8z) - (4.3x - 1.2z)$

First, remove all of the terms from parenthesis. Be careful to handle the signs of each individual term correctly:

$3.1x + 2.8z - 4.3x + 1.2z$

Next, group like terms:

$3.1x - 4.3x + 2.8z + 1.2z$

Now, combine like terms:

$(3.1 - 4.3)x + (2.8 + 1.2)z$

$-1.2x + 4.0z$

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