greyhhun greyhhun

12-08-2018
Mathematics

contestada

Find the number of real number solutions for the equation. x2 + 9x + 20 = 0

Respuesta :

konrad509 konrad509

12-08-2018

[tex] x^2 + 9x + 20 = 0 \\
x^2+4x+5x+20=0\\
x(x+4)+5(x+4)=0\\
(x+5)(x+4)=0\\
x=-5 \vee x=-4
[/tex]

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