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3(5x²)/12 +4(7x)/12 -6(3x²)/12 + 4(2x)/12 =
15x²/12 +28x/12 -18x/12 +8x/12 =
-3x²/12 +36x/12 simplificando
-x²/4 +3x
Respuesta
-x²/4 +3x
- ------- + ------- - ------- - ------ = ------- - ------ + ----- + ------- = -----------------------------------
- 4 -2 -3 -3 4 2 3 3 12
-3x² + 36x 3x(-x + 12) x(12-x)
------------------- = -------------------- = ---------------
12 12 4