Question

What is the factored form of the polynomial? x^2 + 9x +20

Answer 1

x^2 + 9x + 20 = 0
x^2 + 5x + 4x + 20 = 0
x [ x + 5 ] + 4 [ x + 5 ] = 0
[ x + 5] [ x + 4 ] = 0 
This is the factored form of the equation given 
however its zeroes will be
[x+5]=0 & [x+4] = 0
x = -5 or x= -4. 

Answer 2

x^2+9x+20

x^2+4x+5x+20

x(x+4)+5(x+4)

(x+4)(x+5)

hope it helps plz mark as brainlirst