Sunday

February 1, 2015

February 1, 2015

Posted by **Nicole** on Wednesday, June 29, 2011 at 2:29pm.

1. Factor: 4x^2-100y^2

2. Factor: 3x^2+27

3. Solve 3x^2+9x=0

4. Solve 12^2+30x=-12

5. 9a(a+1)=4

6. Solve 16x^2=25

- Algebra II -
**MathMate**, Wednesday, June 29, 2011 at 4:29pmHints:

1. Factor: 4x^2-100y^2

use difference of two squares,

(a²-b²)=(a+b)(a-b)

2. Factor: 3x^2+27

the common factor is 3.

3. Solve 3x^2+9x=0

factor and solve:

3x(x+3)=0

therefore

x=0 or x=?

4. Solve 12^2+30x=-12

Factor out the 6, and then factor completely to solve for x:

6(2x²+5x+2)=0

Hint: it's in the form

(2x 1)(x 2)

5. 9a(a+1)=4

Expand, transpose everything to the left, and then factor.

9a²+9a-4=0

6. Solve 16x^2=25

isolate variable:

x²=(25/16)=(5/4)²

and solve for x.

**Answer this Question**

**Related Questions**

Algebra II - Solve 1. 3x^2-9x=0 2. 12x^2+30x=-12 3. 9a(a+1)=4 4. 16x^2=25

help...solving a polynomial....algebra - solve this please....help me....12x(...

Algerbra - solve for x ac+x=xy have all terms with x on one side ac=xy-x take x ...

Precalc - I have a couple questions, I need to know how to solve these type of ...

algebra - It is not solvable by that method, shanaid. You have to get all the ...

Math - find any stationary points of the function g(x) = (2x-3)square root of 5+...

Algebra - How do you solve for x in (3/4)x^2-12? I'm not sure how to factor this...

Algebra 2 - I would really appreciate it someone helped me with this information...

Math - We have an important chemsitry test due and I want to make sure that I do...

math - solve each equation for 0=/<x=/<2pi sin^2x + 5sinx + 6 = 0? how do ...