Two consecutive sides of a parallelogram are | vedclass

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(c) Since equation of diagonal $11x + 7y = 9$ does not pass through origin, so it cannot be the equation of the diagonal $OB$.

Thus on solving the

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$x - y = 0$

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(c) Since equation of diagonal $11x + 7y = 9$ does not pass through origin, so it cannot be the equation of the diagonal $OB$.

Thus on solving the equation $AC$ with the equations $OA$ and $OC$, we get $A\left( {\frac{5}{3}, - \frac{4}{3}} \right)$ and $C\,\left( {\frac{{ - 2}}{3},\,\frac{7}{3}} \right)$.

Therefore, the middle point M is $\left( {\frac{1}{2},\frac{1}{2}} \right)$

Hence the equation of $OB$ is $y = x$ i.e.,$x - y = 0$.

Two consecutive sides of a parallelogram are $4x + 5y = 0$ and $7x + 2y = 0.$ If the equation to one diagonal is $11x + 7y = 9,$ then the equation of the other diagonal is

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