81x4+4y4 what is the solution?
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hope it helps...... am not sure bout the ans
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81x⁴+4y⁴
(9x²)²+(2y²)²
(9x²+2y²)²–2.9x².2y²
{(9x+2y)²–2.9x.2y}–36x²y²
81x²+4y²–36xy–36x²y²
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