Como factorizar estos trinomios?

ross-hunt_60970933b5498

4x^2+31x-8

2x^2-21x+10

anonymous

primero: 4x^2+31x-8

4x^2 - 1x + 32x - 8

(4x^2 - 1x) + (32x - 8)

1x (4x - 1) + 8 (4x - 1)

(1x+8) (4x-1)

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segundo: 2x^2-21x+10

2x^2 - 1x - 20x + 10

(2x^2 - 1x) - (20x + 10)

1x (2x - 1) - 10 (2x + 1)

(1x - 10) (2x - 1)