Question 1128693
{{{12x^2+15x}}}

{{{3x(4x+5)}}}

x intercepts are {{{-5/4}}} and {{{0}}}.




Vertex occurs for {{{x=-5/8}}}.


{{{12(5/8)^2-15*5/8}}}

{{{12*25/8^2-15*5*8/8^2}}}

{{{(12*25-15*40)/8^2}}}

{{{-300/64}}}

{{{-150/32}}}

{{{highlight(-75/16)}}}---------value of y at the vertex

( -5/8, -75/16 ) vertex