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RS Aggarwal - Mathematics

7. Factorisation

1. Rational Numbers
2. Exponents
3. Squares and Square Roots
4. Cubes and Cube Roots
5. Playing with Numbers
6. Operations on Algebraic Expressions
7. Factorisation
Linear Equations
9. Percentage
10. Profit and Loss
11. Compound Interest
12. Direct and Inverse Proportions
13. Time and Work
14. Polygons
15. Quadrilaterals
16. Parallelograms
17. Construction of Quadrilaterals
18. Area of a Trapezium and a Polygon
19. Three-Dimensional Figures
20. Volume and Surface Area of Solids
21. Data Handling
22. Constructing and Interpreting Bar Graphs
23. Pie Charts
24. Probability
25. Graphs

Exercise 7A

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Exercise 7B

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Exercise 7C

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Exercise 7D

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Exercise 7E

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Q. 113.9( 15 Votes )

<span lang="EN-US

Class 8th RS Aggarwal - Mathematics 7. Factorisation

Answer :

We have,

x³ – 64x

= x(x² – 64)

By using the formula a² – b² = (a + b)(a – b)

We get,

x³ – 64x = x(x² – 64)

= x{(x)² – (8)²}

= x(x + 8)(x – 8)

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