book Maths Puzzle Numerical Ability

Identify the shape of the graph, transform it into standard form, and sketch the graph.
25x^2 + 4y^2 - 300x - 24y + 836 = 0

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book Other Question

3x^2+x+2=0 solve each equation, if solution is not real I need to state all complex solutions in standard form. Please help me answer this questions..
2)what is the midpoint of a segment?