Simplify : (4x – 5y) (5x – 4y)

Simplify : (4x – 5y) (5x – 4y)

Sum

(4x – 5y) (5x – 4y)

= 4x(5x – 4y) – 5y(5x – 4y)

= 20x² – 16xy – 25xy + 20y²

= 20x² – 41xy + 20y²

shaalaa.com

Multiplying a Polynomial by a Polynomial

Is there an error in this question or solution?

Chapter 11: Algebraic Expressions - Exercise 11 (C) [Page 143]

Chapter 11 Algebraic Expressions
Exercise 11 (C) | Q 3.4 | Page 143

Multiply: 6x³ − 5x + 10 by 4 − 3x²

Multiply: 2y − 4y³ + 6y⁵ by y² + y − 3

Simplify : (7x – 8) (3x + 2)

Simplify : (px – q) (px + q)

The adjacent sides of a rectangle are x² – 4xy + 7y² and x³ – 5xy². Find its area.

Evaluate (3x⁴y²) (2x²y³) for x = 1 and y = 2.

Evaluate: xz (x² + y²) for x = 2, y = 1 and z= 1.

Evaluate: x(x – 5) + 2 for x = 1.

Evaluate: 2x(3x – 5) – 5(x – 2) – 18 for x = 2.

Multiply: (ab – 1) (3 – 2ab)