Question

HELP!
Simplify the expression:
7sqrt7- 2sqrt28

A. 3sqrt28

B. -sqrt7

C. 5sqrt28

D. 3sqrt7

Answer 1

Hint: write it instead as...

\[\large 7\sqrt{7} - 2\sqrt{7 \times 4}\]

any better?

Answer 2

i got d 3 squard 7

Answer 3

D it is

Answer 4

So from that^ we can see that the square root of 4...is 2...

Since we can simplify that √4 = 2...we now have

\[\large 7\sqrt{7} - 2 \times 2\sqrt{7}\]
\[\large 7\sqrt{7} - 4\sqrt{7}\]
Now we just combine the two,
\[\large 3\sqrt{7}\]

Answer 5

Thank you so much! @johnweldon1993

Answer 6

No problem :)

Answer 7

wow