Answer:
x = 12
Explanation:
Given
p(x) = x - 3
To find the zero let p(x) = 0, that is
x - 3 = 0 ( add 3 to both sides )
x = 3 ( multiply both sides by 4 )
x = 12 ← zero of p(x)
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x - 3 x - 3 = 0 ( add 3 to both sides ) x = 3 ( multiply both sides by 4 )