Question

(m+n)²-4mn factories​

Answer 1

Answer:$(m+n)^2-4mn=(m-n)(m-n)=(m-n)^2$

Step-by-step explanation:

Using $(a+b)^2=a^2+b^2+2ab$

We have,

         $(m+n)^2-2mn\\=m^2+n^2+2mn-4mn\\=m^2+n^2-2mn\\=(m-n)^2,\because (a-b)^2=a^2+b^2-2ab$

Answer 2

Answer:

(m - n)^2

Step-by-step explanation:

$(m + n)^2 - 4mn\\= m^2 + 2mn + n^2 - 4mn\\= m^2 - 2mn + n^2 \\= (m - n)^2$