Question

Find the exact value of the radical expression in simplest form.

2 the square root of 7 times x + the square root of 7 times x - 3 the square root of 7 times x - 7

Answer 1

Here's the expression based on your question:

2√7x + √7x - 3√7x - 7 =
3√7x - 3√7x - 7 =
0-7 =
-7

The correct answer is -7. You can easily subtract 2√7x, √7x, and 3√7x because they all have √7x in common, so it's basically the same as subtracting simple numbers 2, 1, and 3.