Add, Subtract and Multiply Multivariate Polynomials

What is the result of (x^2 + 2xy - y^2)(3x - 4y)?

• 3x^3 + 2x^2y - 11xy^2 - 4y^3

• 3x^3 + 2x^2y - 11xy^2

• 3x^3 + 2x^2y - 11y^2

• 3x^3 + 2x^2y - 11xy^2 + 4y^3

Simplify the expression (2x^2y + 3xy^2) + (4x^2y - 2xy^2)

• 8x^2y + xy^2

• 6x^2y + xy^2

• 5x^2y - xy^2

• 2x^2y - 3xy^2

What is the result of (5a^2b - 3ab^2) - (2a^2b + 4ab^2)?

• 3a^2b - 7ab^2

• 8a^2b - ab^2

• 2a^2b - 7ab^2

• 5a^2b + 3ab^2

Calculate (2x^2 + 5xy - 3y^2) + (3x^2 - 2xy + 4y^2)

• 2x^2 + 3xy - 3y^2

• 7x^2 + 3xy + y^2

• 5x^2 + 3xy + y^2

• 5x^2 + 2xy - 2y^2

(2x + 5y - z) + (-6x - 4y + 7z)

• -4x +6y + 6z

• 4x + y + 6z

• -4x - y + 6z

• -4x + y + 6z

(4x³-5x²+3x)+(-2x³-x²+6x)

• 2x³-6x²-9x

• 2x³+6x²+9x

• -2x³-6x²+9x

• 2x³-6x²+9x

Find the difference. 
(3- 2x + 2x²) - (4x -5 +3x²)

• x_² + 6x + 8

• 2x² + 5x - 7

• -x² -6x + 8

• -2x² + 11x - 4

(3x²+xy-5y²) + (2x²-xy+3y²)

• 5x²-2xy+8y²

• 5x²-2y²

• 5x²+2y²

• 5x²+2xy-8y²

(4x³-5x²+3x)+(-2x³-x²+6x)

• 2x³-6x²-9x

• 2x³+6x²+9x

• -2x³-6x²+9x

• 2x³-6x²+9x

• None of these

Find the sum.
(2x² + 5x - 7) + ( 3 - 4x² + 6x)

• 2x² + 3x +1

• -2x² - 11x -4

• 2x² + 5x -7

• -2x² + 11x -4