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What is a zero of a quadratic function?
The "zero" or "root" of such a function - or of any other function - is the answer to the question: "What value must the variable 'x' have, to let the function have a value of zero?" Or any other variable, depending how the function is defined.
What is the value of y for any point on the x axis?
It is zero
What operation will change the value of any nonzero number?
multiplying by zero
Is the absolute value of any non zero number is always positive?
yes
Is zero a number or a placeholder?
zero is infact a number not a placeholder contrary to popular belief. many people may argue that zero is the bridge between the positives and the negatives upon the infinite number line. However Zero has a value just as any other number on the number line. zero has a value of zero. this is not an absess of value but the very much real value of zero. if a certain representation has a value on the number line it must therefore be a number. the socalled bridge between the positive and negative numbers is the line upon which all numbers of infinite value are settled.
