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Question

Simplify and check if the following equation is a Quadratic equation.
(x+5)3=x38

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Solution

(x+5)3=x38

x3+3(5)(x+5)+125=x38

x3+15x2+75x+125=x38

15x2+75x+133=0

Yes, it is quadratic as the highest power of x=2.

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