Friday

January 30, 2015

January 30, 2015

Posted by **Kesha** on Monday, February 11, 2008 at 9:23pm.

- ALGEBRA 2 PLEASE HELP -
**Anonymous**, Monday, February 11, 2008 at 9:27pmSet it to 0

2x² - 200 = 0

Factor out the 2

2(x² - 100) = 0

Use difference of squares

2(x + 10)(x - 10) = 0

Solve for x

x = -/+ 10

- ALGEBRA 2 PLEASE HELP -
**Guido**, Tuesday, February 12, 2008 at 7:04amSet the equation to 0 and solve for x.

2x^2 = 200

Divide both sides by 2.

x^2 = 200/2

x^2 = 100

Take square root of both sides.

x = positive 10 and negative 10

Always a positive and negative answer in terms of square roots.

Done!

**Answer this Question**

**Related Questions**

Algebra 2 - How do I solve this quadratic function by finding square roots 2x²=...

algebra 2 - how do you solve quadratic equations by finding square roots

Math - I can't remember how you find the roots of quadratic equations other than...

Math - 5y(squared) + 4 = 14 solve quadratic equations by finding square roots

Math - Solve the equation by factoring, by finding square roots, or by using the...

Algebra2 - Find the polynomials roots to each of the following problems: #1) x^2...

algebra - 1)Solve by factoring:5x^2=4-19x answer=-4,1/5 2)Which quadratic ...

Math - Solve the quadratic function y=2x^2-14x -16 by completing the square. ...

Math - I can't seem remember the rules for this.Can someone please help me with ...

algebra 2 - how do you solve quadratic equations by finding square roots i have ...