Question

Solve u2 =81 , where u is a real number show steps

Answer 1

Hey there!

$\bold{u^2=81}$

Take your SQUARE ROOT

$\bold{New\ equation: x\pm \sqrt{81}}\\ \\ \bold{\sqrt{81}=9}\\ \\ \bold{-\sqrt{-81}=-9}\\ \\ \\ \\ \boxed{\boxed{\bold{Answer: x=-9\ or\ x =9}}}\huge\checkmark$

Good luck on your assignment and enjoy your day!

~$\frak{LoveYourselfFirst:)}$