2x²-9x+7≥0
2x²-2x-7x+7≥0
2x(x-1)-7(x-1)≥0
(x-1)(2x-7)≥0
x∈(-∞;1]∪[3,5;+∞)
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2x²-9x+7≥0
2x²-2x-7x+7≥0
2x(x-1)-7(x-1)≥0
(x-1)(2x-7)≥0
x∈(-∞;1]∪[3,5;+∞)