Is $x+sqrty=4$ a linear function and explain your reasoning?

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Answer 1 · 2017-06-03T20:00:08

No it is not.

We have $x + (y)^(1/2) = 4$

$implies (y)^(1/2) = 4-x$

Squaring both sides,

$y = x^2 - 8x + 16$

Looks like a quadratic polynomial doesn't it ?

Is x+sqrty=4x+sqrty=4 a linear function and explain your reasoning?