Question

If x + y = 10 and
1/x + 1/y = 5/12, then the value of x - y is:​

Answer 1

Answer:

We use 2 Formulas;

x

$(x + y) ^{2} =x^{2} + y {}^{2} + 2xy \\ and\\( x - y) {}^{2} = x {}^{2} + y {}^{2} - 2xy$