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When x/y = 4, x2 − 12y2 =?
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When x/y = 4, x2 − 12y2 =?

User Bas Van Dorst
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x/y = 4 , x = 4y

x^2 -12y^2 = (4y)^2 - 12y^2 = 16y^2 -12y^2 = 4y^2
User Worthwelle
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