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(5root7 +3)(4-root7) |
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Answer» ong>Answer: 17√7 - 23Step-by-step explanation: (5√7 + 3)(4 - √7)REMEMBER:5√7 x 4 = 20√7 ,3 x √7 = 3√7and √7 x √7 = 7(5√7 + 3)(4 - √7)= 20√7 - 5(7) + 12 - 3√7= 20√7 - 35 + 12 - 3√7= 17√7 - 23 |
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