1.(x2+3).(x4-3x2+9)
2.(2x+1).(4x2-2x+1)
3.(x2+2).(x4-2x2+4)
4.(3x+2).(9x2-6x+4)
Bài 1: Thu gọn các biểu thức sau
a)(2x2 + 5x - 2)(2x2 - 4x +3)
b)(2x -3)(3x - 2) - 3x(2x - 5)
c)(x -1)(x2 + x + 1) - (x + 1)(x2 - x +1)
d)(x2 + x - 1)(x2 - x + 1)
e)(2 + 3y)2 - (2x -3y)2 -12xy
d)(x2 - 4x)(5 + 2x - x2)
cảm ơn!giúp mình với chiều nay ktra 15ph T_T
thu gọn biểu thức
a) (6x-2)2+4(3x-1)(2+y)+(y+2)2-(6x+y)2
b)5(2x-1)2+2(x-1)(x+3)-2(5-2x)2-2x(7x+12)
c)2(5x-1)(x2-5x+1)+(x2-5x+1)2+(5x-1)2-(x2-1)(x2+1)
d)(x2+4)2-(x2+4)(x2-4)(x2+16)-8(x-4)(x+4)
1.(x+2)3+(x-3)2-x2(x+5)
2.(2x+3).(x-5)+2x(3-x)+x-10
3.(-x-2)3+(2x-4).(x2+2x+4)-x2.(x-6)
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)
Thực hiện phép tính :
1.(2x+3).(x-5)+2x(3-x)+x-10
2.(-x-2)3+(2x-4).(x2+2x+4)-x2.(x-6)
Thực hiện phép tính
1.(x-1)3-x(x-2)2+1
2.2x(3x+2)-3x(2x+3)
3.(x+2)3+(x-3)2-x2(x+5)
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 + 5 )2 - ( x - 3 )2 = 2x - 7
b, ( 2x - 3 ) . ( 4x2 + 6x + 9 ) = 98
c, ( \(\dfrac{1}{9}\)x2 + \(\dfrac{2}{3}\)x + 4 ) . ( \(\dfrac{1}{3}\)x - 2 ) = 56
d, 16x3 - 12x2 + 3x - 7 = 0
Giúp mình với!!!!!!!!!!!!!!!!!!
1, Tìm x
(x+ 3)3- x.(3x+1)2+ (2x+1). (4x2-2x+1) =28
2, Rút gọn
(a+b+c)2+(b+c-a)2+(c+a-b)2+(a+b-c)2