Question

$(4x - 9y) - (4x + 9y)$
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Answer 1

Answer:

-16x^2+81y^2 is the correct answer .

Step-by-step explanation:

=(4x-9y) -(4x+9y)

= (4x-9y) (-4x-9y)

= 4x(-4x-9y) - 9y(-4x-9y)

= -16x^2-36xy+36xy+81y^2

= -16x^2+81y^2

• Hope this will help you out
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