Question: 8. Explain why the equation y(x + y + 1) dx+ (x+ 2y) dy = 0 is NOT exact. Then show that ,u(x) = ex

8. Explain why the equation y(x + y + 1) dx+ (x+ 2y) dy = 0 is NOT exact. Then show that ,u(x) = ex is an integrating factor for the equation. Do NOT solve the new equation

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