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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.

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 111k views
5 votes
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
User Taimoor Sikander
by
7.6k points

1 Answer

1 vote

Answer:

si sumas 9+4×5 te da la respuesta

answered
User Tabbek
by
8.6k points
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