exam Maths Puzzle Numerical Ability

Find the value of a so that the quadratic equation
5x^2 - 12ax + 9a^2 - 6a + 9 = 0 has real roots.

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exam Other Question

determine the lcd:can you show me step by step so i can finish the rest? thanks!

4 over x^2 - 6x minus 5 over x^2 - 36

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the greater of two consecutive even integers is 6 less than three times the lesser