Wednesday

March 4, 2015

March 4, 2015

Posted by **Astri** on Thursday, November 4, 2010 at 8:43am.

- Math -
**Henry**, Friday, November 5, 2010 at 6:44pmsqrt(ax^2 - b) = c,

sqrt(2x^2 - 7) = 5,

Square both sides:

2x^2 - 7 = 25,

2x^2 = 25 + 7,

2x^2 = 32,

x^2 = 32 /2 = 16,

Take sqrt of both sides and get:

x = +- 4.

**Answer this Question**

**Related Questions**

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

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

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 * √...

algebra 1 help - simplifying square roots 1) find volume of this prism? v=bwh b...

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/√...