1.Решить неполные квадратные уравнения:
1) -3,5x²=0
2)5x²+2x=0
3)4x²-25=0
4)(x-4)(x+6)=(2-x)(x-12)
2.Решить уравнения:
1)x²+6x+5=0
2)2x²-5x+3=0
3)2x²-7x-4=0
4)x²+2 3x-1 5x+3
_____+___=____
3 2 4
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