Question

Repedeee!!!Cine rezolva primul acesta expresie ii dau coroana!!!
$e(x) = (2x \times + 1) { }^{2} - 2(x - 1) {}^{2} + (1 - x)(x + 3)$

Answer 1

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Answer 2

( 2 x + 1)² - 2 ( x - 1)² + ( 1 - x) ( x + 3) = ( x - 3)² - 7 

= 4 x² + 4 x + 1 - 2 ( x² - 2 x + 1 ) + ( x - x² + 3 - 3 x) =

= 4 x² + 4 x + 1 - 2 x² + 4 x - 2 + 3 - x² - 2 x = 

= x² - 6 x + 2 = 

= x² - 6 x + 9 - 7 =

= ( x - 3)² - 7