book Maths Puzzle Numerical Ability

For quadratic functions, sketch two parabolas showing all procedure (concavity, y-intercepts, x-intercepts, symmetric axis, and vertex point)

a) {{{y=3x^2-4x+1}}}

b) {{{y=-2x

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book Other Question
If QS is the angle bisector of PQR. How would I find two angles measures of it? Can someone show me how to work this out and what the graph would look like
f(x)=x^2+2

thanks