Are √2−√5 real numbers?

  √2 and √5 and their difference are all real numbers

Step-by-step explanation:

In looks like you want to know if the difference ...

is a real number.

The square root of a non-negative number is a real number. The sum or difference of real numbers is a real number.

The sum you have indicated is a real number, approximately ...

  √2 -√5 ≈ 1.4142 -2.2361 ≈ -0.8219

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

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