\(\left(2x+1\right)\left(2x-1\right)=\left(2x\right)^2-1^2=4x^2-1\)
\(\left(2x+1\right)\left(2x-1\right)=\left(2x\right)^2-1^2=4x^2-1\)
1-2x/2x + 2x/2x-1 + 1/2x-4x^2
1-2x/2x+2x/2x-1+1/2x-4x^2
1-2x/2x+2x/2x-1+1/2x-4x^2
(2x-3)^2+(2x-1)(2x+1)-(2x+1)(4x^2-2x+1)+8x^3(x-1)=13
giải phương trình sau
2x/ 2x - 1 + x/ 2x + 1= 1 + 4/ (2x - 1) * (2x + 1)
2x+3/2x+1-2x+5/2x+7=1-6x^2+9x-9/(2x+1)(2x+7)
(2x+1)^2+(2x-1)^2-2(2x-1)(2x+1)
cộng phân thức đại số :
(1 - 2x)/2x + 2x/(2x - 1) + 1/(2x - 4x2)
d) (3x – 5)(7 – 5x) – (5x + 2)(2 – 3x) = 4 g) 3(2x - 1)(3x - 1) - (2x - 3)(9x - 1) =0 j) (2x – 1)(3x + 1) – (4 – 3x)(3 – 2x) = 3 k) (2x + 1)(x + 3) – (x – 5)(7 + 2x) = 8 m) 2(3x – 1)(2x + 5) – 6(2x – 1)(x + 2) = - 6
Tính (rút gọn )
1, 2x(3x-1)-(2x+1)(x-3)
2, 3(x^2-2x)-(4x+2)(x-1)
3, 3x(x-5)-(x-2)^2 -(2x+3)(2x-3)
4, (2x-3)^2+(2x-1) (x+4)