Question

Subtract the polynomials (7.8x - 3.4y + z) and (-9.2x + 4.8y - 2.1z), then place the answer in the proper location on the grid. Write answer in x-y-z order and include the tenths place.

Answer 1

`17.0x-8.2y+3.1z`

Explanation:

We are given that two polynomials

(7.8x-3.4y+z) and (-9.2x+4.8y-2.1z)[/tex]

We have to subtract the polynomials.

`(7.8x-3.4y+z)-(-9.2x+4.8xy-2.1z)`

Open the bracket

`7.8x-3.4y+z+9.2x-4.8y+2.1z`

Rearrange the terms

`(7.8x+9.2x)-(3.4y+4.8y)+(z+2.1z)`

Combine like terms

`17.0x-8.2y+3.1z`

Hence, the answer is given by

`17.0x-8.2y+3.1z`

Answer 2

Subtracting the polynomials will give us:
(7.8x-3.4y+z)-(-9.2x+4.8y-2.1z)
=(7.8x+9.2x)+(-3.4y-4.8y)+(z+2.1z)
=17x-8.2y+3.1z

Answer: 17x-8.2y+3.1z