Bài 1:So sánh(hai lần bình phương) 1)√30− √29 và√ 29−√28 2)√8+√5 và√ 7+√6 3)√27+√6+1 và√ 48 4)5√2+√75và5√ 3+√50 Bài 2:Tìm số x: 1)3x^2=75 2)2^x2=32 3)x^2=144 4)x^2=225

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