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Find (2x – y + 3z) (4x2 + y2 + 9z2+ 2xy + 3yz – 6xz). Please answer

Posted by Aditya Koshti 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

(2x – y + 3z) (4x2 + y2 + 9z2+ 2xy + 3yz – 6xz).
=(2x+(-y)+z) {(2x)²+y²+(3z)²-(2x)(-y)-(-y)(3z)-(3z)(2x)

It is based on this formula

=a³+b³+c³-3abc

=2x³+(-y)³+3z³-3(2x)(-y)(3z)

=2x³+(-y)³+3z³+18xyz

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