Question Function Find the vertex Find the axis of symmetry Rewrite in vertex form Load more (3,18) Evaluate A(x)=x(12−2x)Write the quadratic function in standard form A(x)=−2x2+12xFind the x-coordinate of the vertex by substituting a=−2 and b=12 into x = −2ab x=−2(−2)12Solve the equation for x x=3Find the y-coordinate of the vertex by evaluating the function for x=3 A(3)=−2×32+12×3Calculate More Steps Evaluate −2×32+12×3Multiply the terms More Steps Evaluate −2×32Evaluate the power −2×9Multiply the numbers −18 −18+12×3Multiply the numbers −18+36Add the numbers 18 A(3)=18Solution (3,18) Show Solution Graph