Question

expand the following (X - 2 y + 3 z)2​

Answer 1

Answer:

(

−

2

+

3

)

2

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

Answer 2

Answer:

$\huge\mathfrak{ \underline{\underline{Answer : - }}}$

$We \: take \: a=x,b=2y,c=3z \: in \: the \: expansion$

$(a+b+c) ^2 =a ^2 +b^2+c^2+2ab+2bc+2ca \\ </p><p> We obtain \\ </p><p>(x+2y+3z)^2 =x^2+(2y)^2+ (3z)^2 \\ +2x(2y)+2(2y)(3z)+2(3z)x=x^2+ 4y^2 \\ +9z^2 +4xy+12yz+6zx$

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