SOLUTION: solve 2x - 7*(sq.rt of x) - 30 = 0

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Question 74406This question is from textbook introduction and intermediate algebra
: solve 2x - 7*(sq.rt of x) - 30 = 0 This question is from textbook introduction and intermediate algebra

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let y=sqrt%28x%29, then substitute
2y%5E2-7y-30=0
using quadratic formula: y=%287%2B-sqrt%28289%29%29%2F4 or y=%287%2B-17%29%2F4
so y=6 and y=-%285%2F2%29
since x=y%5E2;
then x=36 and x=25%2F4

you should note that for the x=25%2F4 value, it is the negative square root that satisfies the equation