SOLUTION: Simply: (2 -3x)^2 I need to really understand how they came up with the answer to this one, I have my final tomorrwo. Th e other problem is find the y intercept for 2x - 3y =6.

Algebra ->  Expressions -> SOLUTION: Simply: (2 -3x)^2 I need to really understand how they came up with the answer to this one, I have my final tomorrwo. Th e other problem is find the y intercept for 2x - 3y =6.       Log On


   



Question 35743: Simply: (2 -3x)^2 I need to really understand how they came up with the answer to this one, I have my final tomorrwo. Th e other problem is find the y intercept for 2x - 3y =6. Thank you so very much for any help. Thank you Thank you.
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
The first problem is a F OI L problem. First write it like this:
+%282-3x%29%5E2
+%282-3x%29%282-3x%29+
+4+-+6x+-+6x+%2B+9x%5E2
4+-+12x+%2B+9x%5E2

The second question, any time you need the y intercept, just let x = 0 and solve for y.

2x - 3y = 6
2(0) - 3y = 6
-3y = 6

Divide both sides by -3:
+%28-3y%29%2F%28-3%29+=+6%2F%28-3%29
y=+-2

Sometimes this is written in (x,y) form (0,-2). Remember in this form, it's always in alphabetical order, with the x first, and the y second.

Good luck on your test!! Then again, it's NOT luck--it's PREPARATION!!!

R^2 at SCC