Radical Equation?

1 ⤊

How would you square this

5-√2x+5

2007-05-09 13:11:17 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

2x+5 is all under the square root

2007-05-09 13:19:56 · update #1

3 answers

I assume 2x+5 is under the radical, √(2x+5).

So you have a binomial and multiple each term by each term (FOIL):

[ 5 - √(2x+5) ]² =
25 - 10√(2x+5) + [√(2x+5)]² =
25 - 10√(2x+5) + 2x + 5 =
2x - 10√(2x+5) + 30

2007-05-09 13:19:24 · answer #1 · answered by Philo 7 · 1⤊ 0⤋

I believe you combine the 5's and then square it by the 2x.

2007-05-09 20:14:43 · answer #2 · answered by cheeze 2 · 0⤊ 0⤋

It can be simplified to 10-squareroot(2). Then, treat it as a binomial and multiply it by itself term by term.

2007-05-09 20:16:34 · answer #3 · answered by wtf 2 · 0⤊ 0⤋