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You substitute the value of the variable into the quadratic equation and evaluate the expression.
Substitute the first of the ordered pair wherever x appears in the equation and the second value wherever you have y. Evaluate the equation. If it is true, then the point is on the line and if not, it is not.
Substitute the numerical value of the position of the specific term in the equation and evaluate the result.
Fractions and decimals that represent the same value are equivalent. For example, 1//4 and 0.25 are equivalent.
If this value a satisfy the equation, then a is a solution for that equation. ( or we can say that for the value a the equation is true)