msmith16 msmith16

04-09-2018
Mathematics

contestada

Find the number of real number solutions for the equation. x^2+9x+20=0
A.) Can't be determined by graph
B.) 1
C.) 2
D.) 0

Respuesta :

JulianVella JulianVella

04-09-2018

x^2+9x+20 = 0
factorises to (x+5)(x+4)=0
so x = -5 or -4
Therefore answer is C.) 2

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