Question

(2m-3n)square-(2m+3n)square​

Answer 1

hey...

(2m-3n) ^2 = (2m)^2 + (3n)^2 - 2(2m)(3n)

= 4m^2 + 9n^2 - 12mn ...... (1)

(2m+3n)^2 = (2m)^2 + (3n)^2 + 2(2m)(3n)

= 4m^2 + 9n^2 + 12mn..... (2)

(1) - (2)

= 4m^2 + 9n^2 - 12mn - 4m^2 - 9n^2 -12mn

= -24mn

Answer 2

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