## View Poll Results: What is the square of -9

Voters
10. You may not vote on this poll
• 81

10 100.00%
• -81

0 0%
• 99

0 0%
• 39

0 0%
• 84

0 0%

1. ## Formula Manipulation

Hello!!!!!!!!!!!

Can anyone help me understand formula manipulation I am an Ordinary Level Student, and my final exams are in January. I have given my e-mail adresse of yahoo and msn both so please mail me if you can let me understand formula manipulation very good.

I will be very thankful to that peson who will let me understand formula manipulation very good and to those who will try to help me also.

Thank You,
Mathematician.

2. Originally Posted by Mathematician
Hello!!!!!!!!!!!

Can anyone help me understand formula manipulation I am an Ordinary Level Student, and my final exams are in January. I have given my e-mail adresse of yahoo and msn both so please mail me if you can let me understand formula manipulation very good.

I will be very thankful to that peson who will let me understand formula manipulation very good and to those who will try to help me also.

Thank You,
Mathematician.
As stated, the problem is $(-9)^2 = (-9)(-9) = 81$.

However, have some care because $-9^2 = -9 \cdot 9 = -81$. The difference is that this one does not include squaring the negative sign, so the problem statement must be read carefully.

-Dan