Question

Expansion:–

(2a + 3b - 4c)²​

Answer 1

Answer:

Hi

here is ur answer:-

( 2a + 3b + 4c )²

dear , we need a formula which is

( a + b + c )² = a² + b² + c² + 2 ( ab + bc + cb )

now ,

( 2a )² + ( 3b )² + ( 4c )² + 2 { ( 2a.3b + 3b.4c + 4c.2a ) }

= 4a² + 9b² + 16c² + 2 { ( 6ab + 12bc + 8ca )}

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Step-by-step explanation:

ques Is (2a + 3b +4c)²

Answer 2

$\huge\sf\underline{Question}$

$\: \: \: \: \: \: \: \: \: \: \: \: (2a + 3b - 4c)²$

$\huge\sf\underline{Answer}$

$\small\fbox\pink{(a+b+c)²=a²+b²+c²+2(ab+bc+ca}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: (2a + 3b - 4c) {}^{2}$

$\\: \: \: \: \: \: \: \: \: = \: \: \: \: \: (2a) {}^{2} + (3b ) {}^{2} +( 4c) \: \: {}^{2} + \\ 2(2a)(3b) + 2(3b)( - 4c) + \\ 2(2a)( - 4c)$

$\\ \\ \: \: 4a {}^{2} + 9b {}^{2} + 16c {}^{2} + 12ab - 24bc - 8ac$

$\small\purple{\textbf {\textsf {@akeertana503}}}$