+0

# (5a+5)(5a+5)

#3
+11

They are both fantastic answers.  Thank you very much. Actually I have  a 3rd answer.

(5a+5)(5a+5)    This is a perfect square so there is a nice short cut

\$\$\boxed{(a+b)^2=a^2+2ab+b^2}\$\$

so

\$\$(5a+5)^2\\\\
=(5a)^2+2*25a+5^2\\\\
=25a^2+50a+25\$\$

Jul 17, 2014

#1
+8

You have to use the

First

Outside

Inside

Last

method. 5a*5a = 25a2          ---First

5a*5 = 25a        ---Outside

5*5a = 25a           ---Inside

5*5 = 25              ---Last

25a+25a + 25a+ 25

25a2 + 50a + 25

Jul 17, 2014
#2
+11

So we wil solve this like;

\$\$(5a+5)(5a+5)\$\$

\$\$=5a(5a+5)+5(5a+5)\$\$  (now we will multiply them)

\$\$=25a^2+25a+25a+25\$\$  (now we will add the like values)

i hope uve understood by now but if not then pls be freee to ask!

Hope this helps!  Jul 17, 2014
#3
+11

They are both fantastic answers.  Thank you very much. Actually I have  a 3rd answer.

(5a+5)(5a+5)    This is a perfect square so there is a nice short cut

\$\$\boxed{(a+b)^2=a^2+2ab+b^2}\$\$

so

\$\$(5a+5)^2\\\\
=(5a)^2+2*25a+5^2\\\\
=25a^2+50a+25\$\$

Melody Jul 17, 2014
#4
0

Thank you very much Melody!Your answer is also as fantastic as ours! Jul 17, 2014