Question

(3x-2y+5z) x (x+y-z)​

Answer 1

Answer:

$4 {x}^{2} - 2 {y}^{2} - 5 {z}^{2}$

Answer 2

3x(x+y-z) -2y(x+y-z) +5z(x+y-z)

3x²+3xy-3xz -2xy-2y²+2yz+5xz+5yz-5z²

(By adding xy with xy nd yz with yz nd xz with x)

3x²+xy+2xz-2y²+7yz-5z²

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