Question

solve
m² = 400 by factorization method​

Answer 1

m²=400

m²- 400=0

(m×m)- (20×20)=0

(m-20)(m-20)=0

m-20=0

m=20

Answer 2

solution:-

=> m² = 400

=> m = √ 400

=> m = √ 2 × 2 × 2 × 2 × 5 × 5

=> m = 2 × 2 × 5

=> m = 20

I hope it helps you...