Question

expand of the following (x-2y+3z )​

Answer 1

Answer:

(−x+2y−3z)

2

Using (a+b+c)

2

=a

2

+b

2

+c

2

+2ab+2bc+2ac

=(x)

2

+(2y)

2

+(3z)

2

+2(−x)(2y)+2(2y)(−3z)+2(−x)(−3z)

=x

2

+4y

2

+9z

2

−4xy−12yz+6xz