Question

Factor: c2 - d2


Answer

(c + d)(c - d)

(c + d)(c + d)

(c + 2d)(c - d)

Answer 1

Difference of squares!

Answer 2

\[
a^2-b^2=(a-b)(a+b)
\]

Answer 3

It's factors are sum and difference of binomials. :)

Answer 4

Medal

Answer 5

its A .

Answer 6

c(c)-d(d)
(c-d)(c+d)

Answer 7

or (c+d)(c-d)

Answer 8

@uri:your answer is true but how can we have (c-d)(c+d) from c(c)-d(d) ?
can u prove it ?:)

Answer 9

Distributive property of multiplication over addition.\[
\huge QED
\]

Answer 10

Well,
c(c)-d(d)
=
(c+d)(c-d)
or
(c-d)(c+d)

Answer 11

Well,
c(c)-d(d)
=
(c+d)(c-d)
or
(c-d)(c+d)

Answer 12

Distributive property of multiplication over addition.
QED

Answer 13

@uri : :) I wanted prove not answer again :)

Answer 14

No problem :)
Thank u :)

Answer 15

\[\begin{split}
c(c)-d(d)
&=c(c)-d(d)+0 \\
&=c(c)-d(d)+(cd-dc) \\
&=c(c)-d(d)+c(d)-d(c) \\
&=c(c)+c(d)-d(d)-d(c) \\
&=[c(c)+c(d)]-[d(d)+d(c)] \\
&=c(c+d)-d(d+c) \\
&=(c-d)(c+d) \\
\end{split}
\]

Answer 16

@E.ali Medal, now.

Answer 17

medal me.kthxbye.

Answer 18

i dont know who i should give medal too o.O

Answer 19

To me. Please

Answer 20

To me duh.I gave the ansur first.

Answer 21

Also,I'm a pretty girl.

Answer 22

ali gave me first answer :D

Answer 23

Whose the prettiest gets the medal.

Answer 24

i dont see ur picture D:

Answer 25

Eli didn't even explain you xD

Answer 26

ahahahaha :D

Answer 27

Be like dat.Uri won't half ya with ansurs again.

Answer 28

Nobody should get a medal for giving the ANSWER. The medal should go to the person who explained/taught HOW to answer it. (Even if begging for a medal is pretty pathetic.)

Answer 29

uri, u give to ali then, and i give u :D

Answer 30

ANSUR* @DebbieG

Answer 31

lololol