Why is any number squared equal to the the number before it times the number after it plus one?
Basically:
x(x+2)+1=(x+1)^2
Does this work for all numbers??
In: Mathematics
(a + b)^2
(a+b)(a+b)
a^2 + ab + ab + b^2 (FOIL)
a^2 + 2ab + b^2
This works for all a and b
You just have the case of b=1 and you factored out an a
a(a+2b) + b^2
Latest Answers