Find (2x – y + 3z) …
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Yogita Ingle 4 years, 2 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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