exam Maths Puzzle Numerical Ability

Question: x^2+26x=-68

This is the answer that I got, is it correct?

x =-13 �√101

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exam Other Question

Scetch the graph of the quad function. Give the vertex and axis of symmetry.
f(x)=x2-2x-8 Anyone able to figure this one out? Thanks for your assistance.
What is the equation of the line through points (-3, 2) and (-4, 5)?
a. y= (-3/2)-7
b. y= -3x-7
c. y= -3x+7