2025 CVSS WA2 Q4

2025 CVSS WA2 Q4

4 marks

Expand and simplify \(4\left( a+2b \right)-3\left( a-4b \right)\).[2]
Given that \(x=-1\), \(y=2\) and \(z=-5\), evaluate \({{y}^{3}}+{{x}^{2}}-z\).[2]

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Answer:(a) \(a+20b\) (b) \(14\)

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