Answer:
x = 20
Step-by-step explanation:
given f(x) = , we have to solve
= 4
Square both sides
()² = 4²
x - 4 = 16 ( add 4 to both sides )
x = 20
As a check
=
= 4 ← correct
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Answer:
x = 20
Step-by-step explanation:
given f(x) = , we have to solve
= 4
Square both sides
()² = 4²
x - 4 = 16 ( add 4 to both sides )
x = 20
As a check
=
= 4 ← correct
