Mathematics For Class IX Science - Unit 04: ALGEBRAIC EXPRESSION - Fill In The Blanks And Multiple Choice Questions (MCQs)

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Unit 04: ALGEBRAIC EXPRESSION
Fill In The Blanks And Multiple Choice Questions (MCQs)

1. (7a + 5) (7a - 5) = 49a² - 25. [Hint: (a² - b² = (a-b)(a+b)]
2.(a + 3b)² = a² + 6ab + 9b².
3. (3a - 2b)² = 9a² - 12ab + 4b².
4. (3a³ + b³)³ = 27a⁹ + 27a⁶b³ + 9a³b⁶ + 9b⁹
5. (p - q)³ = p³ - 3p²q + 3pq² - q³.
6.(2a² - 5y² - 3z²)² = 4a⁴ + 25y⁴ + 9z⁴ - 20a²y² + 30y²z² - 12z²a².
7. (x + 2) (x + 5) = x² + 7x + 10.
8. (2l + 3m²) - (2l - 3m²)² = 24lm².
9. The polynomial expression x² + 7x + 3 w.r.t the term is called trinomial.
10. The degree of polynomial x² + xy² + y is 3.
11. The algebraic expression 2a³y + 4ay² -5a² y³ in descending order w.r.t y is -5a² y³ + 4ay² + 2a³y.
12. The value of x - y - xy , if x = 1, y = 1 is 1.
13. (a + b)² + (a - b)² = 2a² + 2b²,
14. if x + y = 8, xy = 15. Find x² +y² = 34.
15. x⁴ + 64 can made a perfect square 16x².
16. if x³ + 4x² - 7x + 3 is divided by x - 1 then remainder is 1.
17. (a - b + c)² = a² - b² + c² - 2ab - 2bc + 2ca
18. (x - 6) (x - 4) = x² - 10x + 24.
19. If a + b = 2 and a - b = 2 then value of a² + b² is 4.

20. (√ x + √ y) (√ x - √ y) = (x - y)
21. (x - y)³ = x³ - y³ + 3x²y - 3xy².

Special Thanks To Sir Sajjad Akber Chandio