\(x\left(x+5\right)\left(x-5\right)-\left(x+2\right)\left(x^2-2x+4\right)=42\)
\(\Leftrightarrow x\left(x^2-25\right)-\left(x^3+8\right)=42\)
\(\Leftrightarrow x^3-25x-x^3-8=42\)
\(\Leftrightarrow-25x-8=42\)
\(\Leftrightarrow-25x=42+8\)
\(\Leftrightarrow-25x=50\)
\(\Leftrightarrow x=-\dfrac{50}{25}=-2\)
tìm x biết:x(x^2-25)-(x+2)(x^2-2x+4)=3
a, Tìm đa thức A biết:x+5/3x-2 =A/x(3x-2)
b, Thực hiện phép tính :5x +10/4x-8 .4-2x/x+2
Tìm x biết:
x3 + (x - 1)3 = (2x - 1)3
(3x - 5)(5 - 3x) + 9(x + 1)2 = 30
x(x + 5)(x - 5) - (x + 2)(x2 - 2x + 4) = 42
tìm x biết:x^5=x^4+x^3+x^2+x+2
giải giúp mk
tim gia tri cua bien thoa man mot dieu kien cho truoc
1) (x-2)^3-(x-3)*(x^2+3x+9)+6(x+1)^2=49
2) x(x+5)(x-5)-(x+2)(x^2-2x+4)=42
3) (x+3)^3-(x+1)^3=56
4) (3x-5)(5-3x)+9(x+1)^2=30
5) x(x+5)(x-5)-(x+2)(x^2-2x+4)=42
HO MIK VS A CAM ON MN
Tìm x biết:x(x+3)-x^2+9=0
Thực hiện phép chia:A=2x^2+3x-2 cho B=2x-1
tìm x biết:x+2 căn 2 x^2+2x^3=0
Tìm x, biết
a) 5x(x-3)^3 - 5(x - 1)^3 + 15(x+2)*(x-2)=5
b)(x+3)^3 - x(3x+1)^2 + (2x + 1)*(4x^2-2x+1)-3x^2= 42
