Question

Multiply 2x - 3y + 5z by x +2y - z​

Answer 1

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Answer 2

$\begin{gathered}→ \bf {2x - 3y + 5z \times (x + 2y - z)} \\ \\→ \bf {2x(x + 2y - z) - 3y(x + 2y - z) + 5z(x + 2y - z)} \\ \\ →\bf{{2x}^{2} \underline{+ 4xy} \: \underline{ - 2xz} \: \underline {- 3xy }- 6 {y}^{2} \underline{+ 3zy } \: \underline{+ 5xz} \: \underline{+ 10zy }- 5 {z}^{2} } \\ \\ →\bf {{2x}^{2} - {6y}^{2} - {5z}^{2} + 4xy - 3xy - 2xz + 5xz + 3zy + 10zy }\\ \\ → { \boxed{ \red{\bf{{2x}^{2} - {6y}^{2} - {5z}^{2} + xy + 3xz + 13zy}}}}\end{gathered}$

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