(3x - 4)(4x - 3) = (6x - 4)(2x - 5)?
(3x - 4)(4x - 3) = (6x - 4)(2x - 5).
(3x - 4)(4x - 3) = (6x - 4)(2x - 5).
En resumen
(3x - 4)(4x - 3) = 12x - 9x - 16x + 12 - 13x + 12 (6x - 4)(2x - 5) = 12x - 30x - 8x + 20 - 26 + 20 ( - 13x + 12)( - 26 + 20) 39x - 260x - 312 + 240 39x - 260x = - 221 - 312 + 240 = - 72.
(3x - 4)(4x - 3) = 12x - 9x - 16x + 12 - 13x + 12
(6x - 4)(2x - 5) = 12x - 30x - 8x + 20 - 26 + 20
( - 13x + 12)( - 26 + 20)
39x - 260x - 312 + 240
39x - 260x = - 221 - 312 + 240 = - 72.
Multiplica paréntesis :
12x ^ 2 - 9x - 16x + 12 = 12x ^ 2 - 8x - 30x + 20
12x ^ 2 - 12x ^ 2 - 9x - 16x + 8x + 30x = 20 - 12
13x = 8
x = 8 / 13.