# Help, Urgent!

• May 9th 2005, 11:27 AM
hodap2001
I need help with the following problems:

Siplify 1/3(3x) + [(-5x) + (5x)]

Simplify and write with positive exponents
xy^5
_____
x^3y

Simplify
√6x^2 * √30x

Factor Completely
324x^2 - 36y - 180x^2 + 20

Factor Completely
49x^2 + 28x + 4

Solve and Check
2[7x + 2 + 4(x + 1)] = -4x + 1

Solve by factoring
3x (x-4) = 5x^2 - 13x

Solve by using the square root method
(11x - 4)^2 = 12

AND LASTLY

SOLVE BY USING THE QUADRATIC FORMULA
3x^2 = -12x - 2
• May 9th 2005, 11:36 AM
Math Help
Simplify 1/3(3x) + [(-5x) + (5x)]

1/3 * 3 = 1 so the first portion becomes x
-5x + 5x = 0 so the second portion dissapears
you are left with:

x

I'll do the second one aswell

Simplify and write with positive exponents

xy^5
_____
x^3y

this can be wrtten as ..x ... y^5
.............................----.*.----
.............................x^3.....y

The forst portion can ber written as 1/x^2 and the second potio as y^4/1
multiply the two parts together and you get

y^4
___
x^2
• May 9th 2005, 12:00 PM
hodap2001
Please NEED HELP WITH THE REMAINING
Please Help Me With The Remaining Math Problems. These Are Due In Less Than Two Hours.
Thanks!
• May 9th 2005, 12:53 PM
Math Help
Simplify
√(6x^2) * √(30x)

x√6 * √6 * √(5x)

6x√(5x)
• May 9th 2005, 01:02 PM
Math Help
SOLVE BY USING THE QUADRATIC FORMULA
3x^2 = -12x - 2

3x^2 + 12x + 2 = 0

a=3
b=12
c=2

-12 +/- √(12^2 - 4*3*2)
.............2*3

-2 + (√120)/6
-2 - (√120)/6

which can be simplified to

-2 + (√30)/3
-2 - (√30)/3
• May 9th 2005, 01:14 PM
Math Help
Solve and Check
2[7x + 2 + 4(x + 1)] = -4x + 1

14x + 4 + 8x +8 = -4x + 1
22x + 12 = 1 - 4x

26x = -11

x = -11/26

Check

2[7(-11/26) + 2 + 4((-11/26) + 1)] = -4(-11/26) + 1
22(-11/26) + 12 = 1 - 4(-11/26)

both sides = 2.6923...
• May 9th 2005, 01:40 PM
hodap2001
Anyone know how to factor??
There have been 65 people who viewed this, does anyone know how to factor those three problems. This forum has been the last resort because I couldn't figure them out on my own....