Use the Distributive Property to prove that these algebraic expressions are equivalent. Explain your answer in one sentence for each expression and show your work. expression1 (x-5)(x+3) expression2 2x^2-x^2-2x-20+5

3 answers

To prove that the expressions (x - 5)(x + 3) and 2x² - x² - 2x - 20 + 5 are equivalent using the Distributive Property, we first need to simplify both sides.

Step 1: Expand Expression 1 \[ (x - 5)(x + 3) = x(x + 3) - 5(x + 3) \quad \text{(using the Distributive Property)} \] \[ = x^2 + 3x - 5x - 15 \] \[ = x^2 - 2x - 15 \]

Step 2: Simplify Expression 2 Next, we simplify expression 2: \[ 2x^2 - x^2 - 2x - 20 + 5 \] Combining like terms: \[ = (2x^2 - x^2) - 2x - 20 + 5 \] \[ = x^2 - 2x - 15 \]

Conclusion: Now we see that both simplified expressions are equal: \[ x^2 - 2x - 15 = x^2 - 2x - 15 \] Thus, the expressions (x - 5)(x + 3) and 2x² - x² - 2x - 20 + 5 are equivalent because they simplify to the same polynomial expression.

can you put this in two sentences were one sentec is the first expression and the other sentences is the second expression

The expression \((x - 5)(x + 3)\) simplifies to \(x^2 - 2x - 15\) using the Distributive Property. The expression \(2x^2 - x^2 - 2x - 20 + 5\) also simplifies to \(x^2 - 2x - 15\), demonstrating that both expressions are equivalent.