Solved on Jan 24, 2024

Simplify 5x2+7x2x2+9y+8y23x5x^2 + 7x - 2x^2 + 9y + 8y^2 - 3x.

STEP 1

Assumptions
1. We are given a polynomial expression: 5x2+7x2x2+9y+8y23x5x^{2}+7x-2x^{2}+9y+8y^{2}-3x.
2. We need to combine like terms to simplify the expression.

STEP 2

Identify like terms in the expression. Like terms are terms that contain the same variables raised to the same power.

STEP 3

Combine the like terms that contain x2x^{2}:
5x22x2=(52)x2=3x25x^{2} - 2x^{2} = (5 - 2)x^{2} = 3x^{2}

STEP 4

Combine the like terms that contain xx:
7x3x=(73)x=4x7x - 3x = (7 - 3)x = 4x

STEP 5

Combine the like terms that contain yy and y2y^{2}. Note that yy and y2y^{2} are not like terms and cannot be combined.

STEP 6

There are no like terms for yy, so we leave the 9y9y as it is.

STEP 7

There are no like terms for y2y^{2}, so we leave the 8y28y^{2} as it is.

STEP 8

Write down the simplified expression by combining the results from steps 3, 4, 6, and 7:
3x2+4x+9y+8y23x^{2} + 4x + 9y + 8y^{2}
The expression is fully simplified.

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