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 √(81)}\\ \\ \bold{√(81)=9}\\ \\ \bold{-√(-81)=-9}\\ \\ \\ \\ \boxed{\boxed{\bold{Answer: x=-9\ or\ x =9}}}\huge\checkmark`

Good luck on your assignment and enjoy your day!

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