Combining Like Terms

What defines "like terms" in algebra?

• Terms that have the same coefficients.

• Terms that have the same variables raised to the same exponents.

• Terms that are separated by addition or subtraction signs.

• Terms that only contain numbers.

Which of the following pairs are considered like terms?

• 4x and -7y

• 2x³ and 6x²

• -10 and 21

• 8xy and 8x

Simplify the expression: 4x² + 6y - 2y + 5 - x²

• 3x² + 8y + 5

• 3x² + 4y + 5

• 5x² + 4y + 5

• 3x² + 4y - 5

Simplify the expression: 8 - 7x² + 6 - 3y - x²

• -8x² - 3y + 14

• -6x² - 3y + 14

• -8x² + 3y + 14

• -8x² - 3y + 2