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Multiply following. Assume that x is positive.
(3√x-√y)(2√x-5√y)
Solution
(3√x-√y)(2√x-5√y) =6√x2-15√x√y-2√x√y+5√y2
Note as well that the fourth rule says that we must not have any radicals in the denominator. To get rid of them we will utilize some of the multiplication ideas which we looked at above and the procedure of getting rid of the radicals in denominator is called rationalizing the denominator. Actually that is really what this next set of examples is about. They are actually more examples of rationalizing the denominator instead of simplification examples.
There is a number. If the sum of digits is 14, and if 29 is subtracted from the number, the digits become equal. Find the number.
how do u do it
15 is 30% of what number?
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A girl has 25 plants in all, 8 of them are tomatos. She has 10 more bean plants than pepper plants. How many pepper plants does she have?
predict whether there is a relationship between the mean January temperatures of a city in North America and the city''s position west of the prime meridian.
27-81/3
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