Question

m2 +40m +400=0 solve to method​

Answer 1

Answer:

(m+20)(m+20)

Step-by-step explanation:

m2+40 m+400=0

m2+20m+20m+400=0

m(m+20)+20(m+20)=0

(m+20)(m+20)=0

hence factorised

Answer 2

m^2 + 40m +400=0

m^2 + 20m +20 m + 400 =0

m( m +20) + 20 ( m + 20) =0

(m +20)(m +20) =0

either m+20 =0 or m+20 =0

so m= -20

please mark as brainliest.