Tìm x, biết:
a) x. (2x - 7) - 4x + 14 = 0
b) x2. (x - 1) - 4x + 4 = 0
c) x + x2 - x3 - x4 = 0
d) 2x3 + 3x2 + 2x + 3 = 0
e) 4x2 - 25 - (2x - 5). (2x + 7) = 0
g) x3 + 27 + (x + 3). (x - 9) = 0
tìm x biết
a/ x^3-x^2-x+1=0
b/(2x^3-3)^2-(4x^2-9)=0
c/x^4+2x^3-6x-9=0
d/2(x+5)-x^2-5x=0
tìm x biết
a/ x^3-x^2-x+1=0
b/(2x^3-3)^2-(4x^2-9)=0
c/x^4+2x^3-6x-9=0
d/2(x+5)-x^2-5x=0
Tìm x biết :
a) 3x(x-1)+x-1=0
b) (x-2)(x2+2x+7+2(x2-4)-5(x-2)=0
c) (2x-1)2-25=0
d) x3+27+(x+3)(x-9)=0
Bài 2: Tìm x
a) x³ - 16x =0
b) x^4 - 2x³ + 10x² - 20x = 0
c) ( 2x - 1)² = ( x + 3 )²
d) x²( x - 2 ) - 2x² + 8x - 8 = 0
e) x^4 - 30x² + 31x - 30 = 0
Câu 1:Tìm x:
a) x3-16x=0 b) x4-2x3+10x2-20x=0
c) (2x-1)2=(x+3)2 d) x2(x-2)-2x2+8x-8=0
Câu 2: tìm x:
c. (x+1)2 - (x+1)(x-2)=0
d.(2x-3)2-(x+5)2=0
f. x3-x2-25x+25=0
h. x3+2x2-x-2=0
i. 2x(x-3)-15+5x=0
Câu 7: ptđtnt
b. 4x2-9y2+6x-9y
f.x2-3x+2
g. x2+9x+18
h. 3x2-5x-2
Câu 8: tìm x
a. 3x2-6x=0
b. x(x-6)+10(6-x)=0
k. x2+4x+3=0
Tìm x , biết
a) 3x(x-1)+x-1=0
b) (x-2)(x2 +2x +7) +2 (x2 -4)-5(x-2)=0
c) ( 2x-1)2 -25=0
d) x3 +27 +(x+3)(x-9)
*mình cần gấp
Tìm x
a,x3-4x2-9x+36=0
b,5x2-4(x2-2x+1)-5=0
c,(x2-9)2-(x-3)=0
d,x3-3x+2=0