1)Rút gọn: (√9+4√5)-(√9-4√5)-√5+(√23-8√7) 2)Chứng minh: x²+x√3+1 luôn luôn dương với mọi x.

asked Dec 5, 2022 111k views

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1)Rút gọn:

(√9+4√5)-(√9-4√5)-√5+(√23-8√7)
2)Chứng minh:
x²+x√3+1 luôn luôn dương với mọi x.

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1 vote

Answer:

si sumas 9+4×5 te da la respuesta

Tabbek answered Dec 11, 2022

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