Question

ES PARA AHORA PLISSS

Answer 1

Respuesta:

x < - 23

Explicación paso a paso:

Formula : -

( a + b ) ( a + c ) = a^2 + ( b + c )a + ac

( x + 3 ) ( x - 4 )

= x^2 + ( 3 + ( - 4 ) )x + ( 3 ) ( - 4 )

= x^2 + ( 3 - 4 )x + ( - 12 )

= x^2 + ( - 1x ) + ( - 12 )

= x^2 - x - 12

( x + 5 ) ( x - 7 )

= x^2 + ( 5 + ( - 7 ) )x + ( 5 ) ( - 7 )

= x^2 + ( 5 - 7 )x + ( - 35 )

= x^2 + ( - 2x ) + ( - 35 )

= x^2 - 2x - 35

( x + 3 ) ( x - 4 ) < ( x + 5 ) ( x - 7 )

x^2 - x - 12 < x^2 - 2x - 35

x^2 - x - 12 - x^2 + 2x + 35 < 0

x^2 - x^2 - x + 2x + 35 - 12 < 0

0 + x + 23 < 0

x < - 23