Question

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

Answer 1

Answer:

B in the photo

Step-by-step 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:

$(4x * (x+7))^{1/2}\\(4x^2 + 28x)^{1/2}\\\\=\sqrt{4x^2 + 28x}$