Question

9 root 7 difference root 28

Answer 1

\[9\sqrt{7} -\sqrt{28}\]

you can simplify this to \[9\sqrt{7} - \sqrt{4 \times 7}\]

which becomes \[9\sqrt{7} - 2\sqrt{7}\]

let y = sqrt(7)

so now its a simple subtraction than substitute back. \[9y - 2y = ?\]

Answer 2

7y?

Answer 3

good now substitute back y

Answer 4

7 root7

Answer 5

yes correct

Answer 6

thank you and love your pic btw

Answer 7

yay XD your welcome =))