Search found 6 matches

Fri Nov 30, 2012 3:29 pm
Topic: Expand Expression
Replies: 2
Views: 2488

Expand Expression

I am checking my answer to expand my expression:

log3(3square root x /81)

I get:

1/3log3 x-4

Did I do this correctly?
Sat Sep 15, 2012 3:23 am
Forum: Beginning Algebra
Topic: Factor x(2) + 4x - 12, how?
Replies: 7
Views: 17670

Re: Factor x(2) + 4x - 12, how?

I prefer the "magic number" way of factoring trinomials since the people I've worked with have seemed to understood it better that way. If your trinomial is in the form of ax² + bx + c, then you find two numbers that multiply to give you the product ac and that add to give you b. With your expressi...
Thu Aug 30, 2012 1:55 am
Forum: Beginning Algebra
Topic: This factored? 8x^2 + 6x - 9 to (4x - 3)(2x + 3)
Replies: 4
Views: 5302

Re: This factored? 8x^2 + 6x - 9 to (4x - 3)(2x + 3)

I don't understand: What do you mean by "the 6 getting into the 8 position"?

Not 8, B, A + B + C, you know...
Thu Aug 30, 2012 1:21 am
Forum: Beginning Algebra
Topic: This factored? 8x^2 + 6x - 9 to (4x - 3)(2x + 3)
Replies: 4
Views: 5302

This factored? 8x^2 + 6x - 9 to (4x - 3)(2x + 3)

How did this factorization come to be? 8x^2\, +\, 6x\, -\, 9\, =\, 0 (4x\, -\, 3)(2x\, +\, 3)\, =\, 0 I see where 4x and 2x came from, and I under stand that -3*3=-9 for the C position, but how did the 6 get there in the B position? Isn't it supposed to be what you get when you add -3 +3? That would...
Fri Aug 24, 2012 9:54 pm
Forum: Beginning Algebra
Topic: Factor x(2) + 4x - 12, how?
Replies: 7
Views: 17670

Re: Factor x(2) + 4x - 12, how?

I'm a litte confused over the box method. So far its been helful. http://www.purplemath.com/modules/factquad2.htm Down in the box area: 4x2 – 19x + 12 = (x – 4)(4x – 3) To the left of the box there is an x and below that a -4 http://www.purplemath.com/modules/quads/quadanim.gif Same thing with this ...
Fri Aug 24, 2012 3:23 pm
Forum: Beginning Algebra
Topic: Factor x(2) + 4x - 12, how?
Replies: 7
Views: 17670

Factor x(2) + 4x - 12, how?

I have not taken algebra in 20 years, and have an algebra class left to complete my associates. Ive been reviewing like crazy, but much of this is still stumping me and I feel behind so I'll be coming in here a bit to see if I can get help, and find a tutor at the college. Im making progress, but it...