\(=x^3-8-x\left(x^2-25\right)=x^3-8-x^3+25x=25x-8\)
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Các câu hỏi tương tự
tìm x biết
a,5x(x-4)3(x+2)(x-4)=2x(x+1)
b,4x(x+2)-x(8x-5)=10
c,(x+3)(2x-5)=2x(x+4)
d,(3x-2)(x+5)-3x(x+4)=5
e,x(x-3)+2x(x+1)=3(x mũ2-4)
Bài 19 Rút gọn
1) (x+2)^2+(3-x)^2
2) (4-x)^2 -(x-3)^2
3) (x-5)(x+5)-(x+5)^2
4) (x-3)^2-(x-4)(x+4)
5) (y^2 -6y+9)-(3-y)^2
6. (2x+3)² –(2x–3).(2x+3)
Bài 19 rút gọn
1) (x+2)^2+(3-x)^2
2) (4-x)^2-(x-3)^2
3) (x-5)(x+5)-(x+5)^2
4)(x-3)^2-(x-4)(x+4)
5) (y^2-6y+9)-(3-y)^2
6) (2x+3)^2-(2x-3)(2x+3)
giải phương trình
a.(2x- 1)x x^2+ 9x (1 - 2x) = 0
b. \(\dfrac{x+4}{5}\)-x -5= \(\dfrac{x+3}{3}\)- \(\dfrac{x-2}{2}\)
c.(x- 5)x (6x+ 3)= (2x-7)x (3x + 5)
d. \(\dfrac{x+4}{5}\)-2x+ 1= \(\dfrac{x}{3}\)- \(\dfrac{2-x}{6}\)
giúp mình nhe :>
A)3x^2-x(3x-5)=9
B)5x^2+9x-2=0
C)x/x+5-x-2/x=2x-1/x^2+5x
D)4(5-3x)=5x-5
E)2x^2-11x+14=0
F)3/2x+3-5/x(2x+3)=4/x
Bài 1:Thực hiện phép tính
a,(5-2x)(x+3)-4x(x+2) b,(3x+1)(x-3)-4(x+2)(x-2)
c,3(x-4)(x+3)+(x-5)(x+3) d,2x(x-4)+(3x-1)(2x-5)
Bài 2:Tìm x biết
a,5x(x+3)-(5x+2)(x+3)=7
b,(3x-1)(3x+2)-9(x+2)(x-2)=10
c,(x+1)(2x-5)+2(3-x)(x+2)=7
d,(1-3x)(x+2)+3x(x-5)=8
Rút gọn các biểu thức sau:
a) 2x(x - 7) - (x + 3)(x - 2) - (x + 4)(x - 4)
b) (2x + 5)(x - 2) - 3(x + 2)2 + (x + 1)2
c) (x + 3)(x - 3) - (x + 5)(x - 1) - (x - 4)2
d) 2x(x + 1)2 - (x - 1)3 - (x - 2)(x2 + 2x + 4)
e) (x + 5)(x - 5)(x + 2) - (x + 2)3
a, (x + 2)(x + 4) - x^2 = 24
b, (x + 5)(x -5) = x^2 + x
c, (2x + 3)(2x -3) = 4x(x -1)
d, (x + 2)(x^2 -2x + 4) = 9
giải các phương trình sau
1/ ( x-2)(x-5)=(x-3)(x-4)
2/ (x-7)(x+7) +x^2 -2=2(x^2+5)
3/ (x-1)^2 +(x+3)^2 =2(x-2)(x=2)
4/ (x+1)^2= (x+3)(x-2)
5/ x^2-(2x-1)(x+3)= 3-x(5+x)
6/ 3(5-2x) -4( x+2) =5x-18
Rút gọn:
1 , -3x(x+2)2+(x+3)(x-1)(x+1)-(2x-3)2
2 , (x-3)(x+3)(x+2)-(x-1)(x2-3)-5x(x+4)2-(x-5)2
3 , 2x(x-4)2-(x+5)(x-2)(x+2)+2(x+5)2-(x-1)2
4 , (x+5)2-4x(2x+3)2-(2x-1)(x+3)(x-3)
5 , -2x(3x+2)(3x-2)+5(x+2)2-(x-1)(2x-1)(2x+1)
Giúp mình với ạ:>