If x=root 3+1/2 find value of 4x3+2x2-8x+7
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If x=√3+1/2,then 4×3+2×2-8×(√3+1/2)+7
=12+4-8√3-4+7
=19-8√3
=12+4-8√3-4+7
=19-8√3
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