No, (x-5)(x+3) is not equivalent to 2x^2-x^2-2x-20+5.
The correct expansion of (x-5)(x+3) is:
(x-5)(x+3) = x(x) + x(3) - 5(x) - 5(3)
= x^2 + 3x - 5x - 15
= x^2 - 2x - 15
So, the correct expanded form is x^2 - 2x - 15, not 2x^2-x^2-2x-20+5.
Is (x-5)(x+3) equivalent to 2x^2-x^2-2x-20+5?Explain why
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