greg-carter_60ba4deba7540
greg-carter_60ba4deba7540
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|x^2 - 2x +3| ≤ 4 <=> x² -2x +3 ≤ 4 e -x^2 +2x -3 ≤4 <=> x^2 -2x - 1 ≤ 0 e -x^2 +2x -7 ≤0 (1) (2) Formula Resolvente (1) x=( 2±√4-4(-1) ) / 2 <=> x= (2±√8) / 2 (2) x= -2 ±√4-4(7)/2 &…