What does this equation look like drawn out? Is is the same as a^2+b^2=c^2 ?

What is the missing constant term in the perfect square that starts with x^2 -20x

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers