Question

sistemas:
3(3⁴ - 5x² + 4) = 12-9x²

Answer 1

3(3⁴ - 5x² + 4) = 12-9x²
3⁴ - 5x² + 4 = 4-3x²
3⁴ - 5x² = -3x²
3⁴ = 2x²
x² = 3⁴/2
x1 = 3²/sqrt(2) = 9/sqrt(2) = 9sqrt(2)/2
x2 = -3²/sqrt(2) = -9/sqrt(2) = -9sqrt(2)/2