Question

I need a little help :)

Simplify. √(9a^2) + √(49b) - a + √b

1) 2b + 8 √a
2) 2b - 8√b
3) 2b + 8√b

Answer 1

So firstly, square root 9a^2 and 49:
`3a+7√(b)-a+√(b)`

Next, combine like terms, and your answer will be
`2a+8√(b)` , or the third option.