Решить уравнение:
а)x²+3x=4
б)2x²-10x=0
в)x²+4=5x
г)-2x²+x+7=-x²+5x-2-x²
д)5x+4/2+3=9x/4
е)x-4/x-6=2
помогите пж даю 30 баллов)
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