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ontapbai35
2 năm trước
Bài 1 : Tìm x , biết : ( x - 2 ) ³ - ( x - 2 ) ( x ² + 2x + 4 ) + 6 ( x - 2 ) ( x + 2 ) = 60 Bài 2 : Tính giá trị của biểu thức : a, A = x³ - 15x² + 75x - 124 tại x = 35 b, B = x³ + 18x ² + 108x + 16 tại x = -26 c, C = ( x² - 4y² ) ( x ² - 2xy + 4y ² ) ( x ² + 2xy + 4y² ) tại x = -2 ; y = $\frac{1}{2}$ Bài 3 : Tìm giá trị của các biểu thức sau : a, M = 3 ( x² + y² ) - ( x ³ + y ³ ) + 1 biết x + y = 2 b, N = 8x³ - 12x ²y + 6xy² - y ³ + 12x ² - 12xy + 3y ² + 6x - 3y + 11 với 2x - y = 9 MONG MỌI NGƯỜI GIÚP VỚI Ạ!!! AI TRẢ LỜI ĐÚNG VÀ DỄ HIỂU THÌ EM ĐÁNH GIÁ 5 SAO Ạ!!
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