Question

Expand :-( a + 2a + 5c ) ^2​

Answer 1

Answer:

9a^2 +30ac + 25^2

Step-by-step explanation:

a +2a = 3a

a +2a = 3aso, it's

=(3a + 5c)^2

Now, using the formula (a+b)^2 = a^2 +2ab+b^2

Now, using the formula (a+b)^2 = a^2 +2ab+b^2We get it's

=(3a)^2 + 2(3a)(5c) + (5c)^2

= 9a^2 +30ac+25c^2

This is a very easy question. I guess you only had problem with the 1st part. You see, a=1a. so 1a+2a=3a.

After that, you have to follow the formula which is simple