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1)
2x² +7x -4 = 0
2 (2x² +7x -4) = 0
(2x)² +7 (2x) -8 = 0
(2x +8) (2x -1) = 0
2
(x +4 ) (2x -1) = 0 → Tenemos dos soluciones
x+4 = 0 2x -1 = 0
x₁ = -4 2x = 1
x₂ = 1/2
2)
6x² = 10 -11x
6x² +11x -10 = 0
6 (6x² +11x -10) = 0
(6x)² +11 (6x) -60 = 0
(6x +15) (6x -4) = 0
3*2
(2x +5) (3x -2) = 0
2x +5 = 0 3x -2 = 0
2x = -5 3x = 2
x₁ = -5/2 x₂ = 2/3
3)
20x² -27x = 14
20x² -27x -14 = 0
20 (20x² -27x -14) = 0
(20x)² -27 (20x) -280 = 0
(20x -35 ) (20x +8) = 0
5*4
(4x -7 ) (5x +2) = 0
4x - 7 = 0 5x +2 = 0
4x = 7 5x = -2
x¹ = 7/4 x₂ = -2/5
Espero que te sirva, salu2!!!!