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honglehong246
2 năm trước
*Thực hiện phép tính: a. A= (x-2)(x^4+2x^3+4x^2+8x+16) với x=3 b. B= (x+1)(x^7-x^6+x^5-x^4+x^3-x^2+x-1) với x=2 c. C= (x+1)(x^6-x^5+x^4-x^3+x^2-x+1) với x=2 d. D= 2x(10x^2-5x-2)-5x(4x^2-2x-1) với x=-5 (Ko thay thế số vào x)
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