\((x+2)(x^2-2x+4)=(x-1)^3+3(x+1)^2\\\Leftrightarrow x^3+2^3=x^3-3x^2+3x-1+3\cdot(x^2+2x+1)\\\Leftrightarrow x^3 +8=x^3-3x^2+3x-1+3x^2+6x+3\\\Leftrightarrow x^3-x^3 +3x^2-3x-3x^2-6x=-1+3-8\\\Leftrightarrow -9x=-6\\\Leftrightarrow x=\dfrac{2}{3}\)
Vậy \(x=\dfrac{2}{3}\)
Tìm x , biết :
a. \(\left(x-2\right)^3-\left(x-3\right)\left(x^2+3x+9\right)+6\left(x+1\right)^2=15\)
b. \(2x^3-50x=0\)
c.\(5x^2-4\left(x^2-2x+1\right)-5=0\)
d. \(x^3-x=0\)
e. \(27x^3-27x^2+9x-1=1\)
Thực hiện phép tính:
a. ( x-2)^3- x(x+1)(x-1)+ 6x(x-3)
b.(x-2)(x^2-2x+4)(x+2)(x^2+2x+4)
Tìm x biết:
a.(x-3)(x^2+ 3x+9)+ x(x+2)(2-x)=1
b. (x+1)^3- (x-1)^3 - 6(x-1)^2=-10
tìm x
b) (x + 3)2 - (x - 4)( x + 8) = 1;
c) 3(x + 2)2 + (2x - 1)2 - 7(x + 3)(x - 3) = 36;
d)(x - 3)(x2 + 3x + 9) + x(x + 2)(2 - x) = 1;
e) (x + 1)3 - (x - 1)3 - 6(x - 1)2 = -19.
hihi
Bài 1: Tìm x, biết:
a) (x+3)^3 - x(3x+1)^2+(2x+1) (4x^2-2x+1)=28
b) x^2-1)^3-(x^4+x^2+1) (x^2-1)=0
Tìm x, biết:
a)9x2–6x–3 = 0
b) (2x + 1)2–4(x + 2)2= 9
c)3(x –1)2–3x(x –5) = 21
d) (x + 3)2–(x –4)(x + 8) = 1
giúp mk với ạ
Thực hiện phép tính:
a. ( x-2)^3- x(x+1)(x-1)+ 6x(x-3)
b.(x-2)(x^2-2x+4)(x+2)(x^2+2x+4)
Tìm x biết:
a.(x-3)(x^2+ 3x+9)+ x(x+2)(2-x)=1
b. (x+1)^3- (x-1)^3 - 6(x-1)^2=-10
help me. giúp mk vs
Bài Tìm x,biết
a) (x-1)^3+(2-x)(4+2x+x^2)+3x(x+2)=16
b) (x+2)(x2-2x+4)-x(x2-2)=16
c) x(x-5)(x+5)-(x+2)(x2-2x+4)=17
d)(x-3)3-(x-3)(x2+3x+9)+9(x+1)2=15
Tìm x a, (x+4)^2-(x+1)(x-1)=19 b, (2x-1)^2+(x+3)^2-5(x+7)(x-7)=0
