Question

Question 21 of 32

What is the solution to √7x - 4 = 2√x?
O.A.4/5
B. -4/5
C.-4/3
D.4/3

Answer 1

E. None of the above

Explanation:

If
`√(7)x -4=2√(x)` ...

Options B & C aren't possible because you can't take the square root of a negative number.

Option A yields ≈ -3.67 ≠ 0

Option D yields ≈ -2.78 ≠ 0

If
`√(7x) -4=2√(x)` ...

Same rule for options B & C

A yields ≈ -3.42 ≠ 0

D yields ≈ -3.25 ≠ 0