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If x2 - 12x + 33 = 0, then what is the value of (x - 4)2 + $$\frac{1}{{{{\left( {x - 4} \right)}^2}}}?$$
Answer & Solution
Correct Answer:
Option
B
$$\eqalign{
& {x^2} - 12x + 33 = 0 \cr
& {x^2} - 12x + 36 - 3 = 0 \cr
& {\left( {x - 6} \right)^2} - 3 = 0 \cr
& x = \sqrt 3 + 6 \cr
& {\left( {x - 4} \right)^2} + \frac{1}{{{{\left( {x - 4} \right)}^2}}} \cr
& \therefore {\left( {\sqrt 3 + 2} \right)^2} + \frac{1}{{{{\left( {\sqrt 3 + 2} \right)}^2}}} \cr
& = {\left( {\sqrt 3 + 2} \right)^2} + {\left( {\sqrt 3 - 2} \right)^2} \cr
& = 2\left( {{{\sqrt 3 }^2} + {2^2}} \right) \cr
& = 2 \times 7 \cr
& = 14 \cr} $$
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