I get the 1, but thought the question was looking for integer values for b and c other than 0...because if b and c are 0, then you can't actually express as a + b root c?
I get the 1, but thought the question was looking for integer values for b and c other than 0...because if b and c are 0, then you can't actually express as a + b root c?
They can be zeroes, it still gives a real solution. The original question is multiplying a surd by it's conjugate which will always give a rational answer - it's how we rationalise the denominator.