Question 1059031
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The solution by "josgarithmetic"    My comments       Right solution


{{{y=a(x-(-3))^2-2}}}                     Correct.      


{{{y=a(x+3)^2-2}}}                        Correct.


{{{a(x+3)^2=2-y}}}                        Wrong.           {{{a(x+3)^2}}} = 2+y. 


{{{a=(2-y)/(x+3)^2}}}                            Wrong.           a = {{{(2+y)/(x+3)^2}}}.


{{{a=(2-145)/(4+3)^2}}}                           Wrong.           a = {{{(2+145)/(4+3)^2}}}.


{{{a=(-143)/49}}}                            Wrong.           a = {{{(147)/49}}} = 3.


{{{y=-(143/49)(x+3)^2-2}}}                 Wrong.           y = {{{3*(x+3)^2-2}}}.
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