TOPIC (X) & (Y) intercepts
I don't understand how this function it has x-intercept !?

Here are my solution
what is wrong with it guys !?

y=0
0 = √x^2-16 +4
(-4)^2 = (√x^2-16)^2
16 = x^2 -16
x^2= 16 + 16
x^2= 32
x=√32

Checking (x=√32) :-
y= √x^2-16 +4
y=√(√32)^2-16 +4
y=√32-16 +4
y=√16 +4
y=4+4
y=8 ✔
so (x=√32) is the x-int of thefunction

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