2 years ago

If xy = a and x2 + y2 = b, which of the following is equivalent to 9b – 18a ?

1 answer:

Llana [10]2 years ago

5 0

Answer:

A) (3x -3y)²

Step-by-step explanation:

9b -18a = 9(x² +y²) -18xy

= 9x² -18xy +9y²

= (3x -3y)² . . . . . matches choice A

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