Kết quả tìm kiếm

Tìm a, b, c, d biết: a) x^4 + ax^2 + b = (x^2 - 3x + 2).(x^2 + cx + d) b) (ax^2 + bx + c).(x + 3) = x^3 + 2x^2 - 3x c) x^4 + x^3 - x^2 + ax +b = (x^2 + x-2).(x^2 + cx + d)

Bài 1: Thực hiện phép tính a) 2x^2–5x.(x+1)+3.(x–1).(x+1) b) 4.(x-1).(x+5)-(x+2).(x+5)-3.(x-1).(x+2) c) 2.(x-2).(x+2)+(8-5x).(x+4)+4.(x-2).(x+1)+10 d) (2b^2-2-6b^3-5b).(3+3b^2-b) e) (2ab+2a^2+b^2).(2ab^2+4a^3-4a^2b) f) (6a^2-12-3a^3).(4a-4a^4+2a^7) g)...