Question

I need to solve 4x^2, x=-7. Do I do 4(-7)^2 or 4*-7^2? The one gives me positive 49 and the other gives me negative 49...

Answer 1

The first :D

Answer 2

thanks!

Answer 3

The first one.

Answer 4

guys!they are both the same

Answer 5

negative only is considered as answer if its the case of root. For example if its √49 then the result will be both -7 and 7. i.e. both positive and negative.

Answer 6

Ah okay, thanks!

Answer 7

you are most welcomed.

Answer 8

4(-7)^2

Answer 9

they are not both the same

Answer 10

what's the difference b/n
\[-7^{2}*4 and 4*-7\]

Answer 11

multiplication is commutative

Answer 12

you get my point?

Answer 13

calculators and computers really need parenthesis

-2^2
first raise 2 to the 2nd power then tack on the - result is

-4
------
(-2)^2
the parenthesis ensure that the whole thing is squared not just the 2 individually but the whole -2

Answer 14

but what you say -7^2*4 is?

Answer 15

-7^2*4 calc will go like this
-(7)^2*4
-(49)*4

Answer 16

I guess I have to admit you won P:

Answer 17

not about winning :P

Answer 18

Ok you are right! how does that make you feel?

Answer 19

I feel great that you learned something. :)