Question

What is the value of x, when x2 + 5 = 21?

Answer 1

Hey there!

• 
  `\bold{x^2+5=21}`
• Firstly, subtract by the number
  `\bold{5}` on each of your sides
• 
  `\bold{x^2+5-5=21-5}`
• 
  `\bold{Cancel:5-5}` because it gives us the result of
  `\bold{1}`
• 
  `\bold{Keep:21-5}` because it equals:
  `\bold{16}`
• 
  `\bold{x^2=16}`
• Nextly, we have to take our square root
• 
  `\bold{x=}`±
  `\bold{√(16)}`
• Solve the square root and you have found your answer
• 
  `\boxed{\boxed{\bold{Answer:x=4[or]x=-4}}}`
  `\bold{\checkmark}`

Good luck on your assignment and enjoy your day!

~
`\bold{LoveYourselfFirst:)}`