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Evaluate 2x squared plus 3x plus 8 when x equals 4.
A40
B60
C52
D34
Answer & Solution
Correct answer: C. 52
1. Substitute 4 for x: 2 times 4 squared plus 3 times 4 plus 8.
2. Simplify the exponent first: 4 squared is 16, so the first term becomes 2 times 16, which is 32.
3. Multiply the second term: 3 times 4 is 12.
4. Add all three terms together: 32 plus 12 plus 8 equals 52.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 1 "Foundations", section 1.2 Use the Language of Algebra_
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