x-intercept transformation

What happens to the x-intercept of y = ax+b when you reverse the leading coefficient, a, and the constant, b? What happens to the x-intercept(s) of y= ax² +bx +c when you reverse the leading coefficient, a, and the constant, c? What happens to the x-intercepts of a polynomial in the form y = axⁿ+ bx^n-1 +cx^n-2+...+z when you reverse the leading coefficient, a, and the constant, z?

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