Answer:
if you mean (a+b)^2 then the rule is..
(a+b)^2=
a^2+2ab+b^2
Step-by-step explanation:
its simply a property of math or a formula and if u want proof this works try it with any two terms like this for example:
(a+b)^2=
(2+7x)^2=
Subsitute.
a^2+2ab+b^2
2^2+2*2*7x+2x^2
so.. 4+28x+4x^2
or 2x^2+28x+4 is your answer :)
and if you solve this using the
(2+7x)(2+7x) looping method thingy
then you will see that you get the same answer of
2x^2+28x+4.
this proves that the formula works.
