if f(x) + ( square root sign) x+4, for what of x does f(x) = 3?
f(x)=square root (x+4)
so what we want to do is make the function equal to the value of 3, so that we can solve for x
so we have
3=(sqaure root) x+4
Now, how do we solve for x since we have that big annoying square root? We simply square both sides. Squaring both sides will cancel the square root, leaving
Now, simple isolate x by subtracting 4 on both sides
Now, just to check, plug x=5 back into the original equation. Does it equal 3? YES!
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