Simplify 3 square root of 10 end root plus 7 square root of 15 end root minus 6 square root of 10 end root minus 4 square root of 15 . A. 3 square root of 10 end root minus 3 square root of 15
B. 3 square root of 15 end root minus 3 square root of 10
C. 3 square root of 30 end root minus 3 square root of 20
D. 3 square root of 20 end root minus 3 square root of 30

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Y+ 2/y is it a polynomial in one variable or not? and if so, why?