Question

Find the square of 2y-3x

Answer 1

Answer:

(2y-3x)²

using (a-b)²=a²+b²-2ab

4y²+9x²-12xy

Answer 2

Answer:

(2y-3x)^2 = (a-b)^2 =a^2-2ab+b^2)

here a=2y,b=3x

=(2y)^2-(2×2y×3x)+(3x)^2

=4y^2-12xy+9x^2

=4y^2 - 12xy + 9x^2

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