Maximum value if this parabola is 7 when x=6 giving the coordinate (6,7) so 7 is your answer

Actually Welcome to the Concept of the Factorisation.
Since here both are the roots of the quadratic equation in the factor form, hence
equate them to zero, to get the value of x
hence,
2x-9 = 0
===> x = 9/2
and
3x+5=0
===> x = -5/3
By adding/ subtraction systems
i think its -3
hope its right and helpful
if it is then mark brainlyist
Answer: 1255637.46
Step-by-step explanation: asked my teacher