simplify by rationalizing denominator 7+3root5 divided by 7-3root 5
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3
Answer:
not sure but this could be the answer
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Answer:
84 + 42√5 / 4
Step-by-step explanation:
7+3√5 / 7-3√5
= (7+3√5)×(7+3√5) / (7-3√5)×(7+3√5)
= (7+3√5)²/ (7)²-(3√5)²
= (7)²+ (2×7×3√5) + (3√5)² / 49 - (9×5)
= 49 + 42√5 + (9×5) / 49 - 45
= 49 + 42√5 + 45 / 4
= 94 + 42√5 / 4
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