Question

Simplify: (x + y)(2x – 3y + z) + 25 .

Answer 1

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2x-3y+z+25
2x-3y=-25-z

Answer 2

(x + y)(2x – 3y + z) + 25

= x(2x -3y + z) + y(2x -3y + z) + 25

= 2x² - 3xy + xz + 2xy - 3y² + yz + 25

= 2x²- xy + xz + yz + 25

Answer: 2x²- xy + xz + yz + 25