Question

write the exapansion of (x-y)²​

Answer 1

Answer:

The binomial theorem states (a+b)n=n∑k=0nCk⋅(an−kbk) ( a + b ) n = ∑ k = 0 n ⁡ n C k ⋅ ( a n - k b k ) . Expand the summation. Simplify the exponents for each term of the expansion. Multiply (x)2 ( x ) 2 by 1 1