Expand the following (x+2y+3z) ^2 step by step
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Step-by-step explanation:
We take a=x,b=2y,c=3z in the expansion
(a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
We obtain
(x+2y+3z)
2
=x
2
+(2y)
2
+(3z)
2
+2x(2y)+2(2y)(3z)+2(3z)x=x
2
+4y
2
+9z
2
+4xy+12yz+6zx
Hope its help.
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