Tính
----- Nội dung dịch tự động từ ảnh -----
a)=x²-x-4)x= -14.
b) 3(1 - 4x)(x - 1) + 4(3x - 2)(x + 3) = -27
c) (x+3)(x²-3x + 9) − x(x - 1)(x+1) = 27.
d) 6x(5x + 3) + 3x(1 - 10x) = 7
e) (3x − 3)(5 - 21x) + (7x + 4)(9x - 5) = 44
f) (x + 1)(x + 2)(x + 5) − x²(x + 8) = 27
a)=x²-x-4)x= -14.
b) 3(1 - 4x)(x - 1) + 4(3x - 2)(x + 3) = -27
c) (x+3)(x²-3x + 9) − x(x - 1)(x+1) = 27.
d) 6x(5x + 3) + 3x(1 - 10x) = 7
e) (3x − 3)(5 - 21x) + (7x + 4)(9x - 5) = 44
f) (x + 1)(x + 2)(x + 5) − x²(x + 8) = 27