Question

Expand the following
1) ( 4a - b + 2c )²

2) (3a - 2b)³

Answer 1

I hope you got your answer
thank you

Answer 2

Heya!

Here is yr answer......


1) (4a-b+2c)²

=> (4a+(-b)+2c)²


[ (a+b+c)² = a²+b²+c²+2ab+2bc+2ca ]


=>(4a)²+(-b)²+(2c)²+2(4a)(-b)+2(-b)(2c) +2(2c)(4a)

=> 16a² + b² + 4c² -8ab -4bc + 16ca


2) (3a-2b)³

[ (a-b)³ = a³-3a²b+3ab²-b³ ]

=> (3a)³ -3(3a)²(2b)+3(3a)(2b)²-(2b)³

=> 27a³ -18a²b + 18ab² - 8b³



Hope it hlpz...