Math, asked by kirostakumari20458, 11 months ago

expond the following (3x-5y-z)^2​

Answers

Answered by manojshrivstv
1

Answer:

the answer is

Answered by vishnupraveen540
3

Using identity:(x+y+z)^2=x^2+y^2×z^2+2xy+2yz+2zx.

x=-3x, y=5y, z=-2z

=(-3x)^2+(5y)^2+(-2z)^2+2×(-3x)×5y+2×5y×(-2z )+2×(-2z)×(-3x)

=9x^2+25y^2+4z^2-30xy-20xy-12zx.

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