1.

(a^2-b^2)^2 plz answer ​

Answer»

ANSWER:

a⁴ + b⁴ - 2a²b²

Step-by-step EXPLANATION:

( a² - b² )²

= [ ( a + B ) ( a - b ) ]²

= [ ( a + b )² ] [ ( a - b )² ]

= [ a² + b² + 2AB ] [ a² + b² - 2ab ]

= a² [ a² + b² - 2ab ] + b² [ a² + b² - 2ab ]

+ 2ab [ a² + b² - 2ab ]

= a⁴ + a²b² - 2a³b + a²b² + b⁴- 2ab³ + 2a³b + 2ab³ - 4a²b²

= a⁴ + b⁴ + a²b² + a²b² - 4a²b² - 2a³b + 2a³b - 2ab² + 2ab²

= a⁴ + b⁴ + 2a²b² - 4a²b² - 0 - 0

= a⁴ + b⁴ - 2a²b²



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