Question

X^2=15999
Cum aflu X plizzz dau 25 de puncte

Answer 1

$x^{2} =15999 => x= \sqrt{15999}$ sau $x=- \sqrt{15999}$.

Rezolvare:
$x^{2} =15999 <=> x^{2} -15999=0 <=> (x+ \sqrt{15999})(x- \sqrt{15999})=0.$ De aici rezulta ca $x+ \sqrt{15999} =0$ sau $x- \sqrt{15999}=0$, iar de aici rezulta ca x∈{$- \sqrt{15999}$ ; $\sqrt{15999}$}.