Hi, can someone help me with these questions
I've expanded both sides and got 1+3x+3x^2+x^3 = 1+5x+10x^2+10x^3+5x^4+x^5 which I know is (1+x)^5
But which part of RHS does 5C2 come from and what part of LHS does the other part of the combinatoric equation come from?
For the second question, I've expanded the two brackets separately in RHS and kept the coefficients in combinatoric form but how would I go about multiplying the two brackets together
I've expanded both sides and got 1+3x+3x^2+x^3 = 1+5x+10x^2+10x^3+5x^4+x^5 which I know is (1+x)^5
But which part of RHS does 5C2 come from and what part of LHS does the other part of the combinatoric equation come from?
For the second question, I've expanded the two brackets separately in RHS and kept the coefficients in combinatoric form but how would I go about multiplying the two brackets together