Question1:$\displaystyle g(x)=x^2+5x+3+m$ is the equation of the symmetry with respect to y axis of $\displaystyle f(x)=x^2-5x+4$ ,find m

Question2:If f:RtoR and $\displaystyle f(x)=x^2-(3k-5)x+m+4$ are given. Find the area of the triangle which is bounded by the symmetry axis of $\displaystyle f(x)$,the line $\displaystyle y=-x$ and the $\displaystyle Ox$ axis. Thanks in advance for the solution of these questions.