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9 questions from this quiz
Use a squared term
A squared is always ≥0\ge 0≥0
Bring all terms to one side
(a−b)2(a-b)^2(a−b)2
a2+b2≥2aba^2+b^2 \ge 2aba2+b2≥2ab
(x−12)2+34(x-\frac{1}{2})^2+\frac{3}{4}(x−21)2+43
Squared term + positive = positive
x2−x+1>0x^2-x+1>0x2−x+1>0
(n+3)2+5(n+3)^2+5(n+3)2+5
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