Question

simplify the expression (−2x + 6y)(4x − 6y).

Answer 1

@Aaron0620 We have
\[(-2x+6y)(4x-6y)\]
Let's open the first bracket and multiply
\[-2x \times(4x-6y)+6y \times(4x-6y)\]
\[-8x^2+\underline{12xy}+\underline{24xy}-36y^2\]
Let's combine the like terms, we get finally
\[-8x^2+36xy-36y^2\]