Answer:
The correct option is 3.
Step-by-step explanation:
The given equation is
\(x^2+9x+20=0\)
Factorize the given equation.
\(x^2+5x+4x+20=0\)
\(x(x+5)+4(x+5)=0\)
\((x+5)(x+4)=0\)
Equate each factor equal to zero.
\(x+5=0\Rightarrow x=-5\)
\(x+4=0\Rightarrow x=-4\)
The solutions of the given equation are x=-5 and x=-4. Therefore the correct option is 3.
