A) X2+ X2+2X+ = −8 12 2XF) 2X2+5X+ −2 2 2X2+5X− =6 1B) 2X2−5 2X2+3X+ = − −9 3X 3G) X2+3X+ −2 2 2X2+6X+ = −2 2C) X2−4X+ =6 2X2−8X+12H) X2+ X2+11 31=D) 3X2+15X+2 X2+5X+ =1 2I) (X+5)(2− =X) 3 X2+3XE) (X+4)(X+ −1) 3 X2+5X+ =2 6

Question

Bài 1: Giải phương trỡnh:a) x2+ x2+2x+ = −8 12 2xf) 2x2+5x+ −2 2 2x2+5x− =6 1b) 2x2−5 2x2+3x+ = − −9 3x 3g) x2+3x+ −2 2 2x2+6x+ = −2 2c) x2−4x+ =6 2x2−8x+12h) x2+ x2+11 31=d) 3x2+15x+2 x2+5x+ =1 2i) (x+5)(2− =x) 3 x2+3xe) (x+4)(x+ −1) 3 x2+5x+ =2 6

Answer

Bài 1: Giải phương trỡnh:a) x2+ x2+2x+ = −8 12 2xf) 2x2+5x+ −2 2 2x2+5x− =6 1b) 2x2−5 2x2+3x+ = − −9 3x 3g) x2+3x+ −2 2 2x2+6x+ = −2 2c) x2−4x+ =6 2x2−8x+12h) x2+ x2+11 31=d) 3x2+15x+2 x2+5x+ =1 2i) (x+5)(2− =x) 3 x2+3xe) (x+4)(x+ −1) 3 x2+5x+ =2 6

A) X2+ X2+2X+ = −8 12 2XF) 2X2+5X+ −2 2 2X2+5X− =6 1B) 2X2−5 2X2+3X+ = − −9 3X 3G) X2+3X+ −2 2 2X2+6X+ = −2 2C) X2−4X+ =6 2X2−8X+12H) X2+ X2+11 31=D) 3X2+15X+2 X2+5X+ =1 2I) (X+5)(2− =X) 3 X2+3XE) (X+4)(X+ −1) 3 X2+5X+ =2 6

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