Multiply: 6a - 5b and - 2a

Sum

Product of 6a - 5b and - 2a

= -2a (6a - 5b)

= - 2a × 6a + (- 2a) × (- 5b)

= - 12a² + 10ab

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Chapter 11: Fundamental Concepts (Including Fundamental Operations) - Exercise 11 (C)

Chapter 11 Fundamental Concepts (Including Fundamental Operations)
Exercise 11 (C) | Q 1.4

Subtract: 4x² - 5x²y + y² from - 3y² + 5xy² - 7x² - 9x²y

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The perimeter of a triangle is 14a² + 20a + 13. Two of its sides are 3a² + 5a + 1 and a² + 10a – 6. Find its third side.

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