15-04-2021
Mathematics

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Factor Completely

a^2 - a - 20

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15-04-2021

Answer:

[tex]\left(a+4\right)\left(a-5\right)[/tex]

Step-by-step explanation:

Break the expression into groups.

=(a^2+4a)+(−5a−20)

Factor out a from a2+4a: a(a+4)

Factor out −5 from −5a−20: −5(a+4)

=a(a+4)−5(a+4)

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