Question

If x + y = 12 and xy = -5, calculate the value of 1/x + 1/y.​

Answer 1

$\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{y}{xy}+\dfrac{x}{xy}=\dfrac{x+y}{xy}=\dfrac{12}{-5}=-\dfrac{12}{5}=-2,4$