Các câu hỏi tương tự
Rút gọn biểu thức:
a, 5.(2x-1)2+4.(x-1).(x+3)-2.(5-3x)2
b, (2a2+2a+1).(2a2-2a+1)-(2a2+1)2
c, (9x-1)2+(1-5x)2+2.(9x-1).(1-5x)
Rút gọn biểu thức:
a, 5.(2x-1)2+4.(x-1).(x+3)-2.(5-3x)2
b, (2a2+2a+1).(2a2-2a+1)-(2a2+1)2
c, (9x-1)2+(1-5x)2+2.(9x-1).(1-5x)
Rút gọn biểu thức:
a, 5.(2x-1)2+4.(x-1).(x+3)-2.(5-3x)2
b, (2a2+2a+1).(2a2-2a+1)-(2a2+1)2
c, (9x-1)2+(1-5x)2+2.(9x-1).(1-5x)
Bài 1: Tính a) (2x – 3).(x + 2) – x.(x + 1) b) 5.(x2 – y2) – (x – y).(x + y) c) 2.(1 – x2) + (3x + 1).(x - 2) d) 4x.(x + y) – (2x - y)2 e) 2a(a+1)-(2a2-1) f) 4(x+2)2+(3+2x)(3-2x) g) (x3 - 3x2 + x - 3):( x - 3) h) (2x4 - 5x2 + x3 – 3 - 3x):(x2 - 3)
Đọc tiếp
Bài 1: Tính
a) (2x – 3).(x + 2) – x.(x + 1) b) 5.(x2 – y2) – (x – y).(x + y)
c) 2.(1 – x2) + (3x + 1).(x - 2) d) 4x.(x + y) – (2x - y)2
e) 2a(a+1)-(2a2-1) f) 4(x+2)2+(3+2x)(3-2x)
g) (x3 - 3x2 + x - 3):( x - 3) h) (2x4 - 5x2 + x3 – 3 - 3x):(x2 - 3)
bài 1 : Rút gọn biểu thức
a) 3x.(x-2)-5x(1-x)-8(x^2-3)
b) (7x-3) (2x+1) - (5x-2) (x+4)-9x^2 + 17x
Thực hiện các phép tính sau:a)
x
6
+
2
x
3
+
3
x
3
−
1
.
3
x
x
+
1
....
Đọc tiếp
Thực hiện các phép tính sau:
a) x 6 + 2 x 3 + 3 x 3 − 1 . 3 x x + 1 . x 2 + x + 1 x 6 + 2 x 3 + 3 với x ≠ ± 1 ;
b) a 3 + 2 a 2 − a − 2 3 a + 15 . 1 a − 1 − 2 a + 1 + 1 a + 2 với a ≠ − 5 ; − 2 ; ± 1 .
Rút gọn:
a) A=(4-5x)2-(3+5x)2
b) B=(3x-1)(1+3x)-(3x+1)2
c) C=(2x+5)3-(2x-5)3-(120x2+49)
d) D=(2a-b+2)3-6(2a-b+2)2+12(2a-b+2)-8-(2a-b)3
1. Rút Gọn
a) -5x (x-3).(2x+4)-(x+3)(x-3)+(5x-2)(3x+4)
b) (4x-1)x(3x+1)-5x^2x(x-3)-(x-4)x(x-5)-7(x^3-2x^2+x-1)
c) (5x-7)(x-9)-(3-x)(2-5x)-2x(x-4)
d)(5x-4)(x+5)-(x+1)(x^2-6)-5x+19
e)(9x^2-5)(x-3)-3x^2(3x+9)-(x-5)(x+4)-9x^3
g) (x-1)^2 - (x+2)^2
Thanks mn nhiều ạ
Rút gọn các biểu thức sau:a) 5(2x-1)2+4(x-1)(x+3)-2(5-3x)2b) (2a2+2a+1)(2a2-2a+1)-(2a2-1)2c) (9x-1)2+(1-5x)2+2(9x-1)(1-5x)d) (x2-5x-1)2+2(5x-1)(x2-5x-1)+(5x-1)2e) (a2+b2-c2)2-(a2-b2+c2)2f) (a+b+c)2+(a-b+c)2+(a+b-c)2+(b+c-a)2g) (a+b+c)1+(a+b-c)2-2(a+b)2h) x(x-1)(x+1)-(x+1)(x2-x+1)i) 3x2(x+1)(x-1)-(x2-1)(x4+x2+1)+(x2-1)3j) (a+b+c)3+(a-b-c)3+(b-c-a)3+(c-b-a)3k) (a+b+c)3-(b+c-a)3-(c+a-b)3-(a+b-c)3
Đọc tiếp
Rút gọn các biểu thức sau:
a) 5(2x-1)2+4(x-1)(x+3)-2(5-3x)2
b) (2a2+2a+1)(2a2-2a+1)-(2a2-1)2
c) (9x-1)2+(1-5x)2+2(9x-1)(1-5x)
d) (x2-5x-1)2+2(5x-1)(x2-5x-1)+(5x-1)2
e) (a2+b2-c2)2-(a2-b2+c2)2
f) (a+b+c)2+(a-b+c)2+(a+b-c)2+(b+c-a)2
g) (a+b+c)1+(a+b-c)2-2(a+b)2
h) x(x-1)(x+1)-(x+1)(x2-x+1)
i) 3x2(x+1)(x-1)-(x2-1)(x4+x2+1)+(x2-1)3
j) (a+b+c)3+(a-b-c)3+(b-c-a)3+(c-b-a)3
k) (a+b+c)3-(b+c-a)3-(c+a-b)3-(a+b-c)3