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qwelly [4]
3 years ago
15

What is the sum of 3x^3-2x+8, 2x^2+5x and x^3+2x^2-3x-3 PLEASE HELP

Mathematics
2 answers:
sdas [7]3 years ago
8 0

Answer:

The sum of given expressions is 4x^3+4x^2+5.

Step-by-step explanation:

The given expressions are

3x^3-2x+8,2x^2+5x,x^3+2x^2-3x-3

We have find the sum of all these expressions.

3x^3-2x+8+2x^2+5x+x^3+2x^2-3x-3

Combine like terms.

(3x^3+x^3)+(2x^2+2x^2)+(-2x+5x-3x)+(8-3)

4x^3+4x^2+(0)+(5)

4x^3+4x^2+5

Therefore the sum of given expressions is 4x^3+4x^2+5.

ss7ja [257]3 years ago
4 0
When adding/subtracting variables you can only add/subtract those variable that are of the same power....

3x^3-2x+8+2x^2+5x+x^3+2x^2-3x-3

(3x^3+x^3)+(2x^2+2x^2)+(-2x+5x-3x)+(8-3)

4x^3+4x^2+5

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