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atroni [7]
3 years ago
11

I,m trying to solve this algebra question: x^+9x+20=0

Mathematics
2 answers:
GuDViN [60]3 years ago
8 0
{ x }^{ 2 }+9x+20=0\\ \\ \left( x+5 \right) \left( x+4 \right) =0\\ \\ \therefore \quad x=-5,\quad x=-4.
cestrela7 [59]3 years ago
5 0
Ok, let assume it's x^2

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
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