Question

reduzca:
(2×+1)² -(x-2)² -3(x²-1)​

Answer 1

Respuesta:

8x

Explicación paso a paso:

( 2x + 1 )²

= ( 2x )² + 1² + 2 ( 2x ) ( 1 )

= 4x² + 1 + 4x

( x - 2 )²

= [ x² + 2² - 2 ( x ) ( 2 ) ]

= ( x² + 4 - 4x )

= x² + 4 - 4x

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

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

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

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

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

= 3x² - 3x² + 8x + 1 - 1

= 0 + 8x + 0

= 8x

Answer 2

Respuesta:

y=×3+1+3×(×+1

(×4-2×2+1

y=×3