Multiply by using the distributive property(x + 5)(x - 3) =

x² + 2x - 15

Step-by-step explanation:

Solve by using FOIL (First, Outside, Inside, Last). This distributes the numbers:

(x + 5)(x - 3)

Use FOIL:

x(x) + x(-3) + 5(x) + (5)(-3)

Simplify:

x(x) + x(-3) + 5(x) + (5)(-3)

x² + x(-3) + 5(x) + (5)(-3)

x² - 3x + 5(x) + (5)(-3)

x² - 3x + 5x + (5)(-3)

x² - 3x + 5x - 15

Combine like terms.

x² + 2x - 15

Your final answer would be x² + 2x - 15

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6 equilateral triangles