Question

Simplify : (0.4m+0.3n)^2- (0.4m-0.3n)^2
WITH SOLUTION PLEASE.​

Answer 1

Answer:

= 0.0.256m⁴ + 0.0081n⁴ - 0.0114mn

Step-by-step explanation:

let a and b be any two variables

then

(a + b)² - (a - b)² = (a² - b²)²

and

(a - b)² = a² + b² - 2ab

here 0.4m has taken place of 'a' and 0.3n has taken place of 'b'

=> (0.4m+0.3n)²- (0.4m-0.3n)²

= ({0.4m}² - {0.3n}²)²

= (0.16 m² - 0.09n²)²

= (0.16m²)² + (0.09n²)² - 2 × (0.16m) × (0.09n)

= 0.0.256m⁴ + 0.0081n⁴ - 0.0114mn

Answer 2

Answer:

(attached in above attachment)

the answer is 0.48mn