exam Maths Puzzle Numerical Ability

What is the graph of the equation 5x2 + 2y2 + 30x - 16y + 67 = 0?

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exam Other Question

the sum of the last two digits of a three digit counting number is 7. the sum of the first two digits is 5. the middle digit is 4 times the first digit. what is the number? 1- y=square root over x+4 2- square root over x^6 3-square root over 8x^6 4-suare root over 27 + sqaure root over 48