Ashu377 Ashu377 06-06-2023 Mathematics contestada Investigate the maxima and minima of the functions, (i) 21x12x²-2y² + x² + xy² (iii) x² + 3xy + y² + x² + y² (v) xy²-5x²8xy - 5y². (ii) 2(x-y)²-x² - y² (iv) x² + 4xy + 4y² + x³ + 2x²y + y4