maths-class-viii-practice-test-05-algebraic-expressions-and-identities-1 (1).pdf

KENDRIYA VIDYALAYA GACHIBOWLI, GPRA CAMPUS, HYD–32 PRACTICE PAPER 05 (2023-24) ALGEBRAIC EXPRESSIONS AND IDENTITIES SUBJECT: MATHEMATICS MAX. MARKS : 30 CLASS : VIII...

KENDRIYA VIDYALAYA GACHIBOWLI, GPRA CAMPUS, HYD–32 PRACTICE PAPER 05 (2023-24) ALGEBRAIC EXPRESSIONS AND IDENTITIES SUBJECT: MATHEMATICS MAX. MARKS : 30 CLASS : VIII DURATION : 1 hr SECTION – A (1 mark) 1. Add 7x² + 11x + 8 and 3x² - 6x - 7. 2. Find the product of 5x²y and -3x³y². 3. Find the product of a4b² and (2a²b)³. 4. Find the product of 3x and 7x + 2. 5. Find the product of - 5m² and 4m² - 2m + 7. SECTION – B (2 marks) 6. Simplify: 5x³ + 6x² + 3x − (−2x³ + 7x² + 3x - 7) 7. Add 3x(7x2 – 5x+3) and 2(x3 – 4x2 + 5). 8. Multiply 2a + 3b by 7a -5b. 9. Multiply : (5a² - 2b) by (2a² - 3b). 10. Find the Square of 9x – 7xy. SECTION – C (3 marks) 11. Simplify : a²(b² - c²) + b²(c² - a²) + c²(a² - b²) 12. Subtract 4p2q – 3pq + 5pq2 – 8p + 7q – 10 from 18 – 3p – 11q + 5pq – 2pq2 + 5p2q 13. Use the identity (x + a) (x + b) = x2 + (a + b) x + ab to find the following products: (i) (4x + 5) (4x – 1) (ii) (2x + 5y) (2x + 3y) 14. Use a suitable identity to get each of the following products. (i) (2y + 5) (2y + 5) (ii) (2a – 7) (2a – 7) 15. Simplify the following expression and evaluate it for a = -1. 5a2(a – 2) – 2a3(a + 4) – 5a(a – 2) Prepared by: M. S. KumarSwamy, TGT(Maths) Page - 1 -