Harappan civilisation, at its peak, covered an area of around 480,000kmē. Its heartland lay in the Hakra river valley in Pakistan, but settlements spread as far as the Makran coast, Baluchistan, Afghanistan, eastern Punjab, Kutch and Saurashtra. They included cities like Harappa, Mohenjo-daro, Kalibangan, Dholavira, ports like Lothal, Sutkagen-dor and Sotka-koh and numerous villages as well.
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... real. (Geometrically, this means that the parabola intersects the x-axis in two points.)
If the discriminant is negative, then there are two different solutions x, both ...