Question

(2x -y + 3z) (2x + y + 3z)​

Answer 1

$(2x - y + 3z)(2x + y + 3z)$

4x² +2xy+6xz-2xy - y²-3yz+6xz +3yz +9z²

$4 {x}^{2} + 12xz - 5xy - {y}^{2} + 9 {z}^{2}$

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