animextrex animextrex

22-08-2017
Mathematics

contestada

factoring
x^2-4x-21=0

Respuesta :

Noah11012 Noah11012

22-08-2017

Find two numbers that add to -4 and that multiply to -21.

After playing around with some numbers, I got -7 and 3.

So, the factored form is (x - 7)(x + 3).

Answer Link

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