exam Maths Puzzle Numerical Ability

(.44721359x^2+.559017)^2-x=0
or
4x^2-4(sqrt(5x))+5=0

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exam Other Question

Is it possible to have 4 or 5 varables in algebra? if so how far can you go? Find 4 solutions for each equation, write the solution as ordered pairs, then graph them.

y=1
and
y=1/2x

thanx! =D