Các câu hỏi tương tự
A 2frac{1}{309}timesfrac{1}{785}-frac{1}{103}times3frac{784}{785}-frac{4}{309times785}+frac{4}{103}B 4frac{1}{113}timesfrac{1}{371}-frac{2}{113}times5frac{370}{371}-frac{3}{113times371}-frac{4}{371}C x^3-31x^2-32x+7 tại x32D left(x-aright)left(x-bright)+left(x-bright)left(x-cright)+left(x-cright)left(x-aright)-x^2tại xa+b+c
Đọc tiếp
A = \(2\frac{1}{309}\times\frac{1}{785}-\frac{1}{103}\times3\frac{784}{785}-\frac{4}{309\times785}+\frac{4}{103}\)
B = \(4\frac{1}{113}\times\frac{1}{371}-\frac{2}{113}\times5\frac{370}{371}-\frac{3}{113\times371}-\frac{4}{371}\)
C = \(x^3-31x^2-32x+7\) tại \(x=32\)
D = \(\left(x-a\right)\left(x-b\right)+\left(x-b\right)\left(x-c\right)+\left(x-c\right)\left(x-a\right)-x^2\)tại \(x=a+b+c\)
\(\frac{x-1}{59}+\frac{x-2}{58}+\frac{x-3}{57}=\frac{x-4}{56}+\frac{x-5}{56}+\frac{x-6}{54}\)Tìm x
(x+1/55 + x+2/56 + x+3/57 + x+4/58)-4=0
\(\frac{1}{x^2+3x+2}+\frac{1}{x^2+5x+6}+\frac{1}{x^2+7x+12}+...+\frac{1}{x^2+15x+56}=\frac{1}{14}\)
Giải PT: \(\frac{x^2+2x+2}{x+1}+\frac{x^2+14x+56}{x+7}=\frac{x^2+6x+12}{x+3}+\frac{x^2+10x+30}{x+5}\)
1.tìm x:
a.7x^2-16x=2x^3-56
b.x^7+x^3+2x^5+2x=0
c.(2x+1)x-5(x+1/2)=0
Bài 4: Tìm x, biết.
a) 4x(x - 7) - 4x2 = 56
b) 12x(3x - 2) - (4 - 6x) = 0
c) 4(x - 5) - (5 - x)2 = 0
d) x(x +1) - x(x - 3) = 0
e) - 6x + 8 = 0 f) 2 + 2x + = 0
Tìm x biết :
(x - 2)3 - (x - 3)(x2 + 3x + 9) + 6(x + 1)2 = 49
x(x + 5)(x - 5) - (x + 2)(x2 - 2x + 4) = 42
(x + 3)3-(x + 1)3 = 56
Bài 1: Viết các biểu thức sau dưới dang tổng
a.(1/2+x)^2 ; (2x+1)^2
b.(2x+3y)^2;(0,01+xy)^2
c (x+1)*(x-1)
d.(x-2y(x-2y);(56*64)