Question

x2+4y2+z2+2xy+xz-2yzby(-z+x-2y)

Answer 1

Use the formula

x³ + y³ + z³ - 3xyz = (x + y + z) (x² + y² + z² - xy - xz - yz)

(x + ⁻2y + ⁻Z) ((x² + 4y² + z² + 2xy + xz - 2yz

x³ + (⁻2y)³ + (⁻z)³ - 3 X x X (⁻2y) X (⁻z)

x³ - 8y³ - z³ - 6xyz