Use the Distributive Property to verify which expression is equivalent to (x−5)(x−3).(1 point)

A 3x2−4x2−3x−15

B 2x−2

C x2−8x+15

D x2−2x+15

1 answer

To verify which expression is equivalent to \((x - 5)(x - 3)\) using the Distributive Property (also known as the FOIL method for binomials), we can expand the expression step by step.

  1. Multiply the first terms: \(x \cdot x = x^2\)

  2. Multiply the outer terms: \(x \cdot (-3) = -3x\)

  3. Multiply the inner terms: \((-5) \cdot x = -5x\)

  4. Multiply the last terms: \((-5) \cdot (-3) = 15\)

Now, combine all these results: \[ x^2 - 3x - 5x + 15 = x^2 - 8x + 15 \]

Thus, the fully expanded form of \((x - 5)(x - 3)\) is: \[ x^2 - 8x + 15 \]

Now, we need to compare this with the given options:

A) \(3x^2 - 4x^2 - 3x - 15\)
B) \(2x - 2\)
C) \(x^2 - 8x + 15\)
D) \(x^2 - 2x + 15\)

The expression that matches our expansion \(x^2 - 8x + 15\) is option C.

So, the answer is C \(x^2 - 8x + 15\).