Question Function Find the vertex Find the axis of symmetry Evaluate the derivative Load more (0,0) Evaluate a=πr2Find the r-coordinate of the vertex by substituting a=π and b=0 into r = −2ab r=−2π0Solve the equation for r r=0Find the y-coordinate of the vertex by evaluating the function for r=0 a=π×02Calculate More Steps Evaluate π×02Calculate π×0Any expression multiplied by 0 equals 0 0 a=0Solution (0,0) Show Solution Solve the equation r=ππar=−ππa Evaluate a=πr2Swap the sides of the equation πr2=aDivide both sides ππr2=πaDivide the numbers r2=πaTake the root of both sides of the equation and remember to use both positive and negative roots r=±πaSimplify the expression More Steps Evaluate πaTo take a root of a fraction,take the root of the numerator and denominator separately πaMultiply by the Conjugate π×πa×πCalculate πa×πCalculate More Steps Evaluate a×πThe product of roots with the same index is equal to the root of the product aπCalculate the product πa ππa r=±ππaSolution r=ππar=−ππa Show Solution Graph