Решить 1)√28*56*10*35
2)√77*24*33*14
3)x^2+5x-6=0
4)7x^2+18x+5=0
5)12,25-3x^2=6x^2
6)4-9(2-5x)^2=0
7)3x^2+4|x|=0
8)4x^2-3|x|+x=0
пожалуйста очень надо!))))
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