Solve the Following Quadratic Equation by Factorization

Question:

\[ \frac{m}{n}x^2+\frac{n}{m}=1-2x \]

Solution

Given:

\[ \frac{m}{n}x^2+\frac{n}{m}=1-2x \]

Multiplying both sides by \(mn\):

\[ m^2x^2+n^2=mn-2mnx \] \[ m^2x^2+2mnx+n^2-mn=0 \]

Observe that:

\[ m^2x^2+2mnx+n^2=(mx+n)^2 \] Therefore, \[ (mx+n)^2-mn=0 \]

Using the identity \(a^2-b^2=(a-b)(a+b)\):

\[ (mx+n-\sqrt{mn})(mx+n+\sqrt{mn})=0 \]

Hence,

\[ mx+n-\sqrt{mn}=0 \] or \[ mx+n+\sqrt{mn}=0 \]

Therefore,

\[ x=\frac{\sqrt{mn}-n}{m} \] or \[ x=-\frac{n+\sqrt{mn}}{m} \]

Final Answer

\[ \boxed{ x=\frac{\sqrt{mn}-n}{m} \quad \text{or} \quad x=-\frac{n+\sqrt{mn}}{m} } \]

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