Question

How is $\alpha ^{2} +\beta^{2} =(\alpha +\beta )^{2} -2\alpha \beta$?
please explain step by step

Answer 1

Answer:

use the formula (a+b)^2=a^2+b^2+2ab

^ means to the power(a^2= a*a)

Step-by-step explanation:

hope it helps you