Subjects algebra

Simplify Rational Expression Cab153

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1. **State the problem:** Simplify the expression \( \frac{12p^2 - 93}{8p^2 - 29p + 40} \). 2. **Factor numerator and denominator:** - Numerator: \(12p^2 - 93 = 3(4p^2 - 31)\) (cannot factor further with integers). - Denominator: Factor \(8p^2 - 29p + 40\). 3. **Factor denominator using AC method:** - Multiply \(8 \times 40 = 320\). - Find two numbers that multiply to 320 and add to -29: -20 and -9. - Rewrite: \(8p^2 - 20p - 9p + 40\). - Group: \((8p^2 - 20p) + (-9p + 40)\). - Factor each group: \(4p(2p - 5) - 8(2p - 5)\). - Factor out common binomial: \((4p - 8)(2p - 5)\). - Simplify \(4p - 8 = 4(p - 2)\). - So denominator factors as \(4(p - 2)(2p - 5)\). 4. **Rewrite the fraction:** $$\frac{3(4p^2 - 31)}{4(p - 2)(2p - 5)}$$ 5. **Check for common factors:** - Numerator \(4p^2 - 31\) does not factor further and shares no common factors with denominator. 6. **Final simplified form:** $$\frac{3(4p^2 - 31)}{4(p - 2)(2p - 5)}$$ This is the simplest form since numerator and denominator share no common factors.