Question

Plz Ans Algebraic Expressions Class 8 Plz ans​

Answer 1

Answer:

4. 10088

5. (x + 3) (x - 3)

6. 46x² + 25 - 70x

Step-by-step explanation:

4. 104 x 97

=> (100 + 4) x (100 - 3)

(here x = 100; a = 4; b = -3)

=> 100² + 100 [4 + (-3)] + (4 x -3)

=> 10000 + (100 x 1) + (-12)

=> 10000 + 100 - 12

=> 10088

5. x² - 9

=> x² - 3²

=> (x + 3) (x - 3)   [a² - b² = (a + b) (a - b)]

6. (7x - 5)²

=> (7x)² + 5² - 2 (7x * 5)   [(a - b)² = a² + b² - 2ab]

=> 49x² + 25 - 70x