Answer:
4x^2-16x-20 is the correct answer really hope this helped :)
Explanation:
4x^2-16x-20
(x-5)(x+1)=x^2-5x+x-5=x^2-4x-5
leading coefficient=4
which means that 4(x^2-4x-5)=4x^2-16x-20 is the answer.
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