Adding & Subtracting Quadratic Expressions

What characteristic defines "like terms" in an algebraic expression?

• They have the same coefficient.

• They have the same variable.

• They have the same exponent.

• They have the same variable and the same exponent.

• 3 and 7

• 3 and -7

• 3x² and 7x²

• 3x² and -7x²

• 1

to write the expression in standard form, which color would go first?

• blue

• purple

• green

What is the invisible number if there is no number in front of the variable?

4m - 2m =

• 2m
• -7
• 7
• 0
• 1
• 2

• is +5y
• is -6
• has no like term
• -y2