Kết quả tìm kiếm

1)a. 2x^{2}+3(x-1)(x+1)-5x(x+1)=2x^2+3(x^2-1)-5x(x+1)=2x^2+3x^2-3-5x^2-5x=-5x-3 b,c tương tự. ĐS: b. x^2-6x+10 c. 6x-24 d. [( x^{2n} + x^n.y^n+y^{2n}).(x^n - y^n )] . (x^ {3n} + y^{3n}) =(x^{3n}-y^{3n}).(x^ {3n} + y^{3n}) =x^{6n}-y^{6n} 2) b...

Choose A, B, C or D to indicate the sentence that is similar in meaning to the one given Question 1: It doesn’t matter how much you offer to pay, he won’t sell the antique vase A. Although you offer to pay him a lot, he won’t sell the antique vase. B. Despite a lot of money you offer to pay, he...

1) D. There's no doubt about it. 2) D. Pretty busy, I think. 11) A. accurate 12) D. Secrets. 13) A. succeed. 14) D. semester. 22) C. When living abroad, it's important for us... 23) D. Intelligent as the may be, the students will not get used to dealing with practical situations. 29) C. Is...

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