Question

Explain how to simplify 4 minus the square root of 28

Answer 1

original equation: 4-sqrt(28)
rewrite: 4-sqrt(4*7)
seperate the roots: 4-sqrt(4)*sqrt(7)
simplify: sqrt(4) = 2 so 4-2*sqrt(7)
thats how i would do it

Answer 2

4 − √28
4 − √4 x 7
4 − √4 x √7
√4=2
4−2 x √7

Correct?

Answer 3

yep

Answer 4

Thank you!

Answer 5

not sure if its needed, but you can go one step further and factor out a 2 so it becomes
2*(2-sqrt(7))