Question

3 c) (m + 2n)(m - 2n) answer ​

Answer 1

Step-by-step explanation:

(m + 2n)(m - 2n)

m² - 2mn + 2mn - 4n²

m² - 4n²

Answer 2

Answer:

${m}^{2} - 4 {n}^{2}$

Step-by-step explanation:

Given,

(m + 2n)(m - 2n)

Since,

$(x + y)(x - y) = {x}^{2} - {y}^{2}$

Then,

$= {m}^{2} - {(2n)}^{2}$

$= {m}^{2} - 4 {n}^{2} (ans)$