M1
1 mark · average 0.9 10% scored 0
The question in our own words · page 8
\(f(x)=x^3-x^2-16x-20\). Show, by substituting, that \(x=5\) solves \(f(x)=0\). No calculator.
Source: VCAA 2025 VCE Mathematical Methods Examination 1, Question 7a
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