Question

Find the square of (3x - 2y)

Answer 1

9x square - 12xy + 4y square

Answer 2

( 3x - 2y) ^2

We know that (a-b)^2 = a^2 + b^2 - 2ab

Therefore, ( 3x-2y) ^ 2

= (3x)^2 + (2y) ^2 - ( 2×3x ×2y)

= 9x^2 + 4y^2 - 12y ans.