exam Maths Puzzle Numerical Ability

Not sure how to do these,need help, thanks

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/2y+7+4=y
(/is the radical sign)
HELP!!
Thank you!
ac Please help me! Cannot figure this out. it says: without drawing the graph of the given equation,determine a)how many x-intercepts the parabola has b)whether its vertex lies above or below or on the x-axis.
y=x^2-5x+6
Please and Thank You=)