1)упростите вырожение: (7x-3)(2x-5)+41x.
2)решите неравенство: -x^2+3x+4>0.
1)(7x-3)(2x-5)+41x
14х²-35x-6x+15+41x
14х²+15
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1)(7x-3)(2x-5)+41x
14х²-35x-6x+15+41x
14х²+15