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-;FINOMIG DF SEGUNDO GRADO - 475Entonces, el trinomio se descompone :1 4 1 46x2 +5x-4 x-- ;' x- ( -- ~, x-- (x+ -2 3/~ - ~;( 2~5~2x-1 3x+4, _ 6(2x-1 )(3x+472 P 3( Í.) Descomponer en factores 24x 2 + 26x + 5 .Igualando a cero el trinomio, se tiene :Resolviendo esta ecuación :Entonces :X =24x 2 + 26x + 5 =R .240 +26x+5=0.-26 262 -4(24)5 -26 196 -26 1448 48 48-26+14 -12x l = - _48 48 4X2_ -26-14 -40 548 48- , - ± x - (- 6) = 24 ( + ) (x + 6 )4x+1 6x+5,='4x l 1 )fbx i 5 ;! R.( < ) Descomponer en factores 4 + 7x - 15x 2.Ordenamos en orden descendente con relación a x y lo igualamos a cero :Resolviendo:Entonces :-15x 2 +7x+4=015x2 -7x-4=07 72 -4 15 ; (-4) 7 = . 289 7 17X = __30 30 30xl_ 7+17 24 __X230 307-17 -10 -30 304 1 15(5x-4)(3x+1 )4+7x-15x2 = 5 1'x+3 )_--_- 3x+1 (4 -- -5x)Ii 4 -3x) R .

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