a) \(x^2+x\)
\(=x.\left(x+1\right)\)
b) \(x^3-x\)
\(=x.\left(x^2-1\right)\)
Chúc bạn học tốt!
a,\(x^2+x\)
\(=xx+x\)
\(=x\left(x+1\right)\)
\(x^2+x\) = \(x\left(1+x\right)\)
\(x^3-x=x\left(x^2-1\right)\)
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a) \(x^2+x\)
\(=x.\left(x+1\right)\)
b) \(x^3-x\)
\(=x.\left(x^2-1\right)\)
Chúc bạn học tốt!
a,\(x^2+x\)
\(=xx+x\)
\(=x\left(x+1\right)\)
\(x^2+x\) = \(x\left(1+x\right)\)
\(x^3-x=x\left(x^2-1\right)\)
(x+2)^2-2x(x+1)+(x-3)(x+3)
(x+2y)(x^2-2xy+4y^2)-(x-2y)(x^2+2xy+4y^2)+2y^3
(3+x)(x^2-9)-(x-3)(x^2+3x+9)
(x-y)^3-(x-y)(x^2+xy+y^2)
Tìm x, biết:
a) 6(x + 2)(x - 3) - 3(x - 2)2 - 3(x - 1)(x + 1) = 1
b) (x - 1)(x2 + x + 1) + x(x + 2)(2 - x) = 5
c) (x - 1)3 - (x + 3)(x3 - 3x + 9) + 3(x - 2)(2 + x) = 2
tìm x biết:
a) (x-3)2-4=0
b) x2-2x=24
c) (x+4)2-(x+1)(x-1)=16
d) (2x+1)2-4(x-1)2=9
e) (x+3)2-(x-4)(x+8)=1
f) (2x-1)2+(x+3)2-5(x+7)(x-7)=0
g) 3(x+2)2+(2x-1)2-7(x+3)(x-3)=36
Tìm x biết
a,(x+4)^2-(x+1)(x-1)=16
b,(2x-1)^2-(x+3)-5(x-7)(x+7)=0
c,3(x-1)^2-3x(x-5)=1
d,6(x-2)^2+(5x-2)^2-4(3x-1)(5x-2)=0
e,(x-2)^3-x^2(x-6)=4
g,(x-1)(x^2+x+1)-x(x+2)(x-2)=5
h,(x-1)^3-(x+3)(x^2-3x+9)+3(x^2-4)=2
1; Thực hiện phép tính.
1, (x+1).(x-2).(x-3)^2
2, x.(x+1)-(x+2).(x-3)
3, (x+2)^2 -(x-2)^2
4, (x+1)^3-(x-1)^3
5,( x+y)^3 -(x-y)^3
6, (x-3).(x+3)-(x-1)^2
7, (x+1).(x-1).(x^2+1).(x^4+1)-x^8
các bạn giúp mình với
Rút gọn
1 (x-2)^2 + (x+3)^2-2.(x+1).(x-1)
2 ( x-y).(x+y).(x^2 +y^2).(x^4 + y^4)
3 3.(x-y)^2-2(x+y)^2+(x+y).(x-y)
4 (x-1)^2 -2(x-1)(x-3)+(x-3)^2
Tìm x biết
1) 8x ^ 3 - 12x ^ 2 + 6x - 1 = 0
2) x ^ 3 - 6x ^ 2 + 12x - 8 = 27
3) x ^ 2 - 8x + 16 = 5 * (4 - x) ^ 3
4) (2 - x) ^ 3 = 6x(x - 2)
5) (x + 1) ^ 3 - (x - 1) ^ 3 - 6 * (x - 1) ^ 2 = - 10
6) (3 - x) ^ 3 - (x + 3) ^ 3 = 36x ^ 2 - 54x
1.(x+2)3+(x-3)2-x2(x+5)
2.(2x+3).(x-5)+2x(3-x)+x-10
3.(x+5).(x2-5x+25)-x(x-4)2+16x
4.(-x-2)3+(2x-4).(x2+2x+4)-x2.(x-6)
1, tìm x :
a) (x+2).(x+3)-(x-2).(x+5)=0
b) (2x+3).(x-4)+(x-5).(x-2)=(x-4).(3x-5)
c) (3x-5).(7-5x)-(5x+2).(2-3x)=3
d)(x-7).(x+7)-(x-4)2-x=10+3
e) (x+1/2)2-(x-1).(x+1)=2x-1
2, Thu gọn :
a) (x+5)2-(3-x)2-2(x-4).(x+4)
b)4(x-1)2+(2x+3)2-8(x-2)(x+2)
rút gọn B=(x+y)^3 +3(x-y)(x+y)^2+3(x-y)^2(x+y)+(x-y)^3
C=8(x/2 +y)3-6(x+2y)2x+12(x+2y)x2-8x3
D=(x-y)3-(3(x-y)2/2)y+(3(x-y)/4)y^2-y3/8