Question

Which of the following is equivalent to the radical expression below when

x20?
VAX 1X+7
A. x 47
B. VAXA + 20%
C. VAMAX
D. X* 20%

Answer 1

B in the photo

Explanation:

another way to write the problem:

square root is also taking the 1/2 power:

`(4x)^(1/2) * (x+7)^(1/2) \\`

since they are raised to the same power:

`(4x * (x+7))^(1/2)\\(4x^2 + 28x)^(1/2)\\\\=√(4x^2 + 28x)`