Flipnote by hazel😃

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Nikki ☆• 2020-06-14 05:48:32 (7045349)
fernando.• 2020-06-14 03:57:57 (7045304)
Middle school: 2 x 3
High school: 2(15x^2-5y^2) = 18x - 14y. Find z.