Question

exapand using identity.1.(2a+3b+c)square .2.(x-6)square.3.(x+1/x)(x-1/x)

Answer 1

Answer:

Step-by-step explanation:

1. (2a+3b+c)²

=(2a)²+(3b)²+(c)²+2*(2a)*(3b)+2*(3b)*(c)+2*(c)*(2a)

=4a²+9b²+c²+12ab+6bc+4ca

2.(x-6)²

=(x)²+(6)²-2*(x)*(6)

=x²+36-12x

3.(x+1/x)(x-1/x)

=(x)²-(1/x)²

=x²-1/x²