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).
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