exam Maths Puzzle Numerical Ability

What type of solution do you get for quadratic equations where D < 0? Give reasons for your answer.

Very confused.

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exam Other Question

Using the given equation, solve for x in terms of y, and solve for y in terms of x.

5y^2 + 3xy - 2x^2 = -3
5[3m-(m+4)]>-2(m-4)
Use the set builder notation to describe the complete solution.