Question

simplify the radical expression
√7 + 3 √7

Answer 1

Let \[\Large x = \sqrt{7}\]

Answer 2

So that means the expression turns into x + 3x

Combine like terms to get 4x

Answer 3

So that show us that

\[\Large \sqrt{7} + 3\sqrt{7} = 4\sqrt{7}\]

Answer 4

you can think of it as "I have 1 square root and then I have another 3 square roots...so I have 4 total square roots"

the "square roots" have to be the same of course

Answer 5

thank you!!! you're a life saver!

Answer 6

you're welcome