# Thread: Math help? plz...! +rep

1. ## Math help? plz...! +rep

1.) a5+a3-a2-1

2.) 2x2-5xy+3y2

3.) a2+ab+ac+ab
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b2+ab+bc+ac

I've asked for help in class, the teacher just ignored, so anyone?

2. wat r the instructions? o.o

3. Indeed, we can't help you if you don't tell us what the instructions are xD

4. do you wanna like...factor them?

for example #3 would be like (a + c)(a + b)

or...evaluate? or... what o.o

without instructions my guess for everything is

1) idunnowatdisis

2) (2x + y) (x - 3y) ~ oh wait scratch that you get -3y^2 not +3y^2. wadaheck. you cant factor it. are you sure it isnt -3y^2 instead of +3y^2 at the end?

3) (a + c)(a + b)

4) (b + c)(b + a)

XDDD

5. ## The Following User Says Thank You to whatareyoudoingomgSTOP For This Useful Post:

Mike (02-15-2012)

6. I'll guess that you have to factor:
1)a5+a3-a2-1=a3(a2+1)-1(a2+1) = (a3-1)(a2+1)=(a-1)(a2+a+1)(a2+1)
2) 2x2-5xy+3y2=(2x+3y)(x+y)
3) a2+ab+ac+ab=a2+2ab+ac= a(a+2b+c)
b2+ab+bc+ac = b2+bc+ab+ac=b(b+c)+a(b+c)=(a+b)(b+c)

7. ## The Following User Says Thank You to bamag For This Useful Post:

Mike (02-15-2012)

8. Oops, one sec xD My bad, totally forgot, lemme get 'em... Gotta translate from Portuguese to English... FML

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