Question

using identity solve

(7a2– 4b)2

please give correct answer ​

Answer 1

Step-by-step explanation:

→ (7a² - 4b) ² = (7a² - 4b) (7a² - 4b)

• 7 (7a² - 4b) × a² - 4b (7a² - 4b)
• 49a⁴ - 28ba² - 4b (7a² - 4b)
• 49a⁴ - 28ba² - 28ba² + 16b²
• 49a⁴ - 15ba² + 16b²