I treat the square roots as having positive values and 'x' as the multiplication sign. It is what should be told in the problem's description, but since it is omitted, I insert it to make your request sensible. Then* = = = 30. ANSWER
how do you do √50x√18? √50 x √18 = 5√2 x 3√2 = 5(3)(√2 x √2) = 15√2 x √2 = 15√4 = 15(2) = 30