5f(x) = 5x²
2f(x) - 3φ(x) = 2x² - 6x - 3
f(x) + φ(x) = x² + 2x + 1 = (x+1)²
f(x)φ(x) = x²(2x+1) = 2x³ + x²
f(x)/φ(x) = x²/(2x+1)
3f(3) = 3*3² = 27
f(3) - φ(3) = 3² - 2*3 - 1 = 9 - 6 - 1 = 2
f(-2) - φ(-2) = (-2)² - 2*(-2) - 1 = 4 + 4 - 1 = 7
f(3)/φ(3) = 3²/(2*3+1) = 9/7