Question

x+y=-2√3 si x la a 2-y la a 2=4√6,atunci x-y=?

Answer 1

x+y=-2√3
x²-y²=4√6
(x+y)(x-y)=4√6
 -2√3(x-y)=4√6
x-y= 4√6/(-2√3)
x-y= 4√2*√3/(-2√3)
x-y=-2√2

Answer 2

$\displaystyle x+y=-2 \sqrt{3} \\ x^2-y^2=4 \sqrt{6} \\ x-y=? \\ x^2-y^2=4 \sqrt{6} \\ (x+y)(x-y)=4 \sqrt{6} \\ -2 \sqrt{3} (x-y)=4 \sqrt{6} \\ x-y=- \frac{4 \sqrt{6} }{2 \sqrt{3} } \\ x-y=-2 \sqrt{2}$