exam Maths Puzzle Numerical Ability

-14<7x<21

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exam Other Question


f(x)=-x^+4x-3




Graph y=f(x)

Show x-and y-intercepts and vertex on the graph

I actually thought y was f(x) from how it was explained in class, where am I off on this?
Multiply
3 square root y^10 * 3 square root 81y^11


Confused! Help!