Evaluate: Xz (X2 + Y2) for X = 2, Y = 1 and Z= 1.

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

Sum

For x = 2, y = 1 and z = 1

xz (x² + y²)

2(1) × (2² + 1²)

2 × (4 + 1)

2 × 5

= 10

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Multiplying a Polynomial by a Polynomial

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

Chapter 11 Algebraic Expressions
Exercise 11 (C) | Q 11.3 | Page 143

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

Simplify : (4x – 5y) (5x – 4y)

Simplify : (3y + 4z) (3y – 4z) + (2y + 7z) (y + z)

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

The base and the altitude of a triangle are (3x – 4y) and (6x + 5y) respectively. Find its area.

Multiply -4xy³ and 6x²y and verify your result for x = 2 and y= 1.

If x = 2 and y = 1; find the value of (−4x²y³) × (−5x²y⁵).

Evaluate: xy²(x – 5y) + 1 for x = 2 and y = 1.

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

Simplify : (5 – x) (6 – 5x) (2 -x).