Question

m^2-4mn+4n^2
Factorise​

Answer 1

Answer:

Given,

m2 – 4mn + 4n2

By using the formula (a - b)2 = a2 - 2ab + b2

= m2 - 2×m×2n + (2n)2

= (m – 2n)2

I hope you can understand

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Answer 2

m² - 4 mn + 4n²

$\leadsto$ (m)² + (2n)² - 2(2n)(m)

(In form of "a² + b² - 2ab")

$\leadsto$ (m - 2n)²

{We know, (a - b)² = a² + b² - 2ab}

$\leadsto$ (m - 2n)(m - 2n)