Algebraic Techniques, SM-Bank 044

Evaluate the expression \(x^2+3x-4\) when:

\(x=1\) (2 marks)

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\(x=3\) (2 marks)

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a. \(0\)

b. \(14\)

Show Worked Solution

a.	\(x^2+3x-4\)	\(=1^2+3\times 1-4 \)
		\(=1\times 1 +3-4\)
		\(=0\)

b.	\(x^2+3x-4\)	\(=3^2+3\times 3-4\)
		\(=3\times 3 +3\times 3-4\)
		\(=14\)