Sunday

March 1, 2015

March 1, 2015

Posted by **Kyle** on Saturday, October 13, 2012 at 6:11pm.

- Math -
**bobpursley**, Saturday, October 13, 2012 at 7:36pmchange u to x^2, then sqrtu = x

x^2-2x-3=0

(x-3)(x+1)=0

x=3, or u= + 9

x=-1, or u=+ 1

checking

u=9

9-2*3=3 checks

u= i

1-2 does not equal 3, does not check.

**Answer this Question**

**Related Questions**

Math - Find an equation of the line that bisects the obtuse angles formed by the...

Algebra - How would i complete these problems? 1. (√6mn)^5 2. ^3√16x...

maths - I will be thankfull to you if you help me to solve the below problem: 6...

Math - Determine the exact value of cos 465 degrees a) √3 + √2/2 b...

Algebra Work Check - 1. 5√6 * 1/6√216 5/6 * √1296 5/6 * √...

Math help Ms. Sue please - 1. What is the simplified form of the expression? 7m^...

grade 11 math - I don't get how to do this. I'm so lost please help me. ...

Algebra 2 Answer Check - Simplify by rationalizing each denominator. 1. 2/√...

Math - Use a sum or difference identity to find the exact value of sin225° a...

Math - Help with radicals please - Please show work Simplify rational 1. 4√...