Determine whether the given differential equations are exact. If they is exact, solve it. (If it is not exact, enter NOT.) 1) (2x ? 1) dx + (5y + 4) dy = 0 2) (7x + 4y) dx + (4x ? 8y³) dy = 0 3) (x² ? y²) dx + (x² ? 2xy) dy = 0 4) (x⁷ + y⁷) dx + 7xy⁶dy = 0

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1. 3. 4. -/1 points ZillDiffEQ9 2.4.001 Determine whether the given differential equation is exact. If it is exact, solve it. (If it is not exact, enter NOT.) (2x - 1) dx + (5y + 4) dy = 0 Need Help? Read It Need Help? Read It -/1 points ZillDiffEQ9 2.4.003. Determine whether the given differential equation is exact. If it is exact, solve it. (If it is not exact, enter NOT.) (7x + 4y) dx + (4x8y) dy = 0 Need Help? Read It Watch It Need Help? Watch It -/1 points ZillDiffEQ9 2.4.007. Determine whether the given differential equation is exact. If it is exact, solve it. (If it is not exact, enter NOT.) (x2 - y) dx + (x22xy) dy = 0 Read It Talk to a Tutor Talk to a Tutor -/1 points ZillDiffEQ9 2.4.010. Determine whether the given differential equation is exact. If it is exact, solve it. (If it is not exact, enter NOT.) (x + y) dx + 7xy dy = 0 Talk to a Tutor Watch It Talk to a Tutor My Notes + Ask Your Teacher My Notes + Ask Your Teacher My Notes Ask Your Teacher My Notes + Ask Your Teacher