Question

expand: (y-{3/y})(y-{3/y})​

Answer 1

Answer:

This is written like (a-b)(a-b) = (a-b)² = a²-2ab+b².

hence, (y-{3/y})(y-{3/y}) = (y-{3/y})²

= y² - 2(y)(3/y) + (9/y²)

= y² - 6 + 9/y².

Hope it helps.

Mark Brainer.

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