First of all, the minus sign before the parenthesis changes the sign of all the terms inside:

Now, we can sum like terms:

So, the final expression is

An Irrational Number is one which cannot be put into rational form (i.e. a fraction)
Pretty much, any decimal that is not in any particular order is irrational. Of this list, <span>√ 8 is the only one that generates a non-repeating decimal, so that is your irrational number.
Hope that helped =)</span>
5(x - 4) = 12 - 3x
5x - 20 = 12 - 3x
2x - 20 = 12
2x = -8
x = -4
Answer:
idu
Step-by-step explanation:
4+8*12=45