<=> \(x^2+4x+4+x^2+2x-3x-6-2x^2+6x=15\)
<=>\(x^2+x^2\)-2x^2+4x+2x+6x+4-6-15=0
<=>tự LÀM TIẾP
<=> \(x^2+4x+4+x^2+2x-3x-6-2x^2+6x=15\)
<=>\(x^2+x^2\)-2x^2+4x+2x+6x+4-6-15=0
<=>tự LÀM TIẾP
tìm x biết
a x^2 (2x+15)+4(2x+15)=0
b 5x(x-2)-3(x-2)=0
c 2(x+3)-x^2-3x=0
tìm x,biết:
a, 3(x-3)-6x=0
b, 2x(x-15)+2x
c, 2(x-3)+3x=9
d, x(x-11)+2(x-11)=0
e,x(x+2)+8=x^2
f, 8(x+1)+2x=-2
g,12-3(x+2)=0
Bài 2: Tìm x, biết: a) (x+2)(x² -2x+4)-x(x²+2)=15 b) (x-2)³-(x-4)(x² + 4x+16) + 6(x+1)=49 c) (x - 1)³ + (2 - x)(4 + 2x + x²)+ 3x(x + 2) = 16 d) (x - 3)³ - (x - 3)(x² + 3x + 9) + 9(x + 1)² = 15
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
1. tìm x
A. x^2 - 2x - 15 - x . x . ( x + 7 ) = 75
B. x . ( x- 3 ) + 3 . ( x - 3 ) - x^2 + 3x = 16
C. 2x^2 - 3x + x . ( 4 - 2x ) - 2x = 5
Tìm x:
2x^3+3x^2+2x+3=0
x^3-4x-14x(x-2)
(x-1,5)+2(15-x)^2=0
9(x-3)^2-4(x+1)^2
Tìm x. biết:
a/12(x-2)(x+2)-3(2x+3)2 =52
b/(2x+1)2 -4(x-1)(x+1)+2x=5
c/(x-2)3-(x-3)(x2+3x+9)+6(x+1)2=15
d/(x+2)(x2-2x+4)-x(x2+2)=15
e/ 12(x-2)(x+2)-3(2x+3)2=57
f/ (3-x)(3+x)+(3x-1)2+6x=522
g/(2x+1)2-4(x-1)(x+1)+2x=5
Tìm x biêts
a. ( x+2)(x^2-2x+4) = 15
b. ( x+3)^3 - x(3x+1)^2 + (2x +1)(4x^2-2x+1) = 28
Tìm x
(2x-1)^3-4x^2(2x-3)=5
(x+4)^3_x^2(X+12)=15
6(x+1)+2(x-1)(x^2+x+1)-2(x+1)^3+32