Originally Posted by VonNemo19 You plugged 'em in right, but unfortunately arrived at the wrong answer. What did you do after that? Look at my last post for a hint. lol I have no idea what to do after that, and yup it can't be negative. Welll..... x^2 - 2xy + y^2 wouldn't have anything to do with it, would it?
Follow Math Help Forum on Facebook and Google+
Originally Posted by marie7 lol i have no idea what to do after that, and yup it can't be negative. $\displaystyle (3)^2+(-6)^2+(5)^2+(-12)^2=?$ Originally Posted by marie7 Welll..... X^2 - 2xy + y^2 wouldn't have anything to do with it, would it? No... But that's the sign of a mathematician - you noticed some squares, and then you started thinkin about how to simplify. Very good.
$\displaystyle (2+1)^2+(-3-3)^2+(10-5)^2+(-5-7)^2$$\displaystyle =3^2+(-6)^2+5^2+(-12)^2=9+36+25+144=214.$ I am so done with this thread...
Okay I can see AlephZero's post. -6^2 is 36 not -36. Thanks a lot everyone
Originally Posted by marie7 I got -146 again! What am I doing wrong? lol Haha. Take a breath, clear your mind...... $\displaystyle (2+1)=3$ Squre it and get 9 $\displaystyle (-3-3)=-6$ Square It and get +36 $\displaystyle (10-5)=5$ Square it and get 25 $\displaystyle -5-7=-12$ Square it and get +144 Add 'em up and whadduya get?
View Tag Cloud