Question

Q1 simplify ( 5a-7) ( 2a+3) (7a+8)​

Answer 1

Multiplying first two brackets we get :

10a²- 14a + 15a - 21 ( 7a+8 )

10a² + a - 21 ( 7a + 8 )

Now multiplying further

70a³ + 7a² - 147a + 80a² + 8a - 168

70 a³ + 87a² - 139a - 168

70 a³ + 87a² - 139a - 168 is the answer

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