(2x-3)^2

= (2x-3)*(2x-3)

Remember "FOIL"?

First Out Inner Last

(2x)*(2x) + (2x)*(-3) + (2x)*(-3) + (-3)(-3)

Always use the parenthesis, remember that your calculator obeys them.

The final answer after cleaning up the mess should be

4x^2 - 12x + 9

This post was edited by Casey on Jan 19 2015 11:21pm

my textbook answer says 4x^2-12x+9

edited, sorry, typo (I worked it out on a napkin lol)

Do you see why though?

This post was edited by Casey on Jan 19 2015 11:21pm

yea i solved the rest thanks to you joggin my memory

can u help me with long division problem

4x^3-3x^2+x+1 divided by x+2

If there was any way to hand you a piece of paper, I would. I'm not going to write all of the division symbols here.

Remember: How many times does "x" go into "blah"......and repeat normal long division. You'll find the variables eventually dissapear (the remainder will be something over x something) That's the quick explanation.

/e If you want the shortcut, since you're dividing by a first degree, you could use synthetic division.

This post was edited by Casey on Jan 19 2015 11:31pm

ok thanks