it is because, a linear function is a linear equation equal to zero. a linear equation is a degree-1 polynomial. Notice that when we perform the operation within x(x+1), the result is x²+1, meaning that the function is a degree-2 polynomial. hence, it is a quadratic function not a linear function
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it is because, a linear function is a linear equation equal to zero. a linear equation is a degree-1 polynomial. Notice that when we perform the operation within x(x+1), the result is x²+1, meaning that the function is a degree-2 polynomial. hence, it is a quadratic function not a linear function