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Question Number 96846 by bobhans last updated on 05/Jun/20

Commented by john santu last updated on 05/Jun/20

[ a^2 x+(2−2a)x^2 +x^4 ]_1 ^2 ≤ 12 ⇔ a^2 +(2−2a).3 + 15 ≤ 12 a^2 −6a+ 21−12 ≤ 0 a^2 −6a + 9 ≤ 0 (a−3)^2 ≤ 0 ; a = 3

[a2x+(2−2a)x2+x4]12⩽12⇔a2+(2−2a).3+15⩽12a2−6a+21−12⩽0a2−6a+9⩽0(a−3)2⩽0;a=3

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