e) A fraction with 2 mixed radicals in the numerator and 2 mixed radicals in the denominator whose result contains a perfect square in the numerator when rationalized.
Q. e) A fraction with 2 mixed radicals in the numerator and 2 mixed radicals in the denominator whose result contains a perfect square in the numerator when rationalized.
Pick Fraction with Mixed Radicals: Let's pick a fraction with mixed radicals. How about something like (2+3)/(5+7)? We want to rationalize this.
Rationalize Denominator: To rationalize the denominator, we'll multiply the numerator and denominator by the conjugate of the denominator. The conjugate of (5+7) is (5−7).
Distribute and Simplify Numerator: So we multiply (2+3)/(5+7) by (5−7)/(5−7).
Use Difference of Squares for Denominator: In the numerator, we'll use the distributive property: (2+3)×(5−7)=2×5−2×7+3×5−3×7.
Finalize Numerator with Perfect Square: Simplify the numerator: 10−14+15−21.
Choose Fraction with Perfect Squares: In the denominator, we'll use the difference of squares: (5+7)×(5−7)=5−7.
Simplify Fraction with Perfect Squares: Simplify the denominator: 5−7=−2.
Simplify Fraction with Perfect Squares: Simplify the denominator: 5−7=−2.Now we have (10−14+15−21)/−2. But we want a perfect square in the numerator.
Simplify Fraction with Perfect Squares: Simplify the denominator: 5−7=−2.Now we have −210−14+15−21. But we want a perfect square in the numerator.Let's try a different approach. We'll start with a fraction that has a perfect square when multiplied out. How about a−ba+b, where a and b are perfect squares?
Simplify Fraction with Perfect Squares: Simplify the denominator: 5−7=−2.Now we have (10−14+15−21)/−2. But we want a perfect square in the numerator.Let's try a different approach. We'll start with a fraction that has a perfect square when multiplied out. How about (a+b)/(a−b), where a and b are perfect squares?Let's pick a=4 and b=1, so we have (4+1)/(4−1).
Simplify Fraction with Perfect Squares: Simplify the denominator: 5−7=−2.Now we have (10−14+15−21)/−2. But we want a perfect square in the numerator.Let's try a different approach. We'll start with a fraction that has a perfect square when multiplied out. How about (a+b)/(a−b), where a and b are perfect squares?Let's pick a=4 and b=1, so we have (4+1)/(4−1).Simplify the fraction: (2+1)/(2−1).
Simplify Fraction with Perfect Squares: Simplify the denominator: 5−7=−2.Now we have (10−14+15−21)/−2. But we want a perfect square in the numerator.Let's try a different approach. We'll start with a fraction that has a perfect square when multiplied out. How about (a+b)/(a−b), where a and b are perfect squares?Let's pick a=4 and b=1, so we have (4+1)/(4−1).Simplify the fraction: (2+1)/(2−1).Now we have 3/1, which is just (10−14+15−21)/−20. But that's not a fraction with mixed radicals in the numerator and denominator.
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