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

Guest Jul 17, 2014

Best Answer 

 #3
avatar+94120 
+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
 #1
avatar+3450 
+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

 

And now you add all these up for your answer.

25a+25a + 25a+ 25

25a2 + 50a + 25

 

And there you go, that's your answer.

NinjaDevo  Jul 17, 2014
 #2
avatar+11852 
+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)

$$=25a^2+50a+25$$   $$ANSWER$$

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

Hope this helps!

rosala  Jul 17, 2014
 #3
avatar+94120 
+11
Best Answer

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
avatar+11852 
0

Thank you very much Melody!Your answer is also as fantastic as ours!

rosala  Jul 17, 2014

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