Activity 4
Find the sum or difference of the following monomials

1: 2× + (-5×)

2: -2a² - (-6a²)

3: y + (-y)

4: -9ײy³ - (-9ײy³)

1. [tex]\( -3x \)[/tex]2. [tex]\( 4a^2 \)[/tex]3. [tex]\( 0 \)[/tex]4. [tex]\( 0 \)[/tex]1. [tex]\(2x + (-5x)\)[/tex]Combine like terms:  [tex]2x + (-5x) = 2x - 5x = -3x[/tex]2. [tex]\(-2a^2 - (-6a^2)\)[/tex]Simplify the double negative: [tex]-2a^2 - (-6a^2) = -2a^2 + 6a^2 = 4a^2[/tex]3. [tex]\(y + (-y)\)[/tex]Combine like terms:  [tex]y + (-y) = y - y = 0[/tex]4. [tex]\(-9x^2y^3 - (-9x^2y^3)\)[/tex]Simplify the double negative: [tex]-9x^2y^3 - (-9x^2y^3) = -9x^2y^3 + 9x^2y^3 = 0[/tex]

Answered by Sefton | 2025-07-08