a) A= \(\left(a+b+c\right)^3+\left(a-b+c\right)^3-6a\left(b+c\right)^2\)
b) B= \(\left(2+1\right)\left(2^2+1\right)\left(2^4+1\right)\left(2^8+1\right)\left(2^{16}+1\right)\)
c) C= \(5\left(2x-1\right)^2+4\left(x-1\right)\left(x+3\right)-2\left(5-3x\right)^2\)
d) D= \(\left(9x-1\right)^2+\left(1-5x\right)^2+2\left(9x-1\right)\left(1-5x\right)\)
e) E= \(\left(2a^2+2a+1\right)\left(2a^2-2a+1\right)-\left(2a^2+1\right)^2\)
Rút gọn các biểu thức sau:
a/ \(\left(3x-1\right)^2-2\left(2-5x\right)-2\left(x^2^{^{ }}+x-1\right)\left(x-\dfrac{1}{2}\right)\)
b/\(\left(4x-y\right)\left(4x+y\right)-2\left(3x-2y\right)^2+\left(x-3y\right)^2\)
c/\(\left(2a-3b+4c\right)\left(2a-3b-4c\right)\)
d/\(\left(3a-1\right)^2+2\left(9a^2-1\right)\left(3a+1\right)\)
e/\(\left(3x-4\right)^2+\left(4-x\right)^2-2\left(3x-4\right)\left(x-4\right)\)
MK CÂNG GẤP Ạ AI NHANH MK SẼ VOTE Ạ
rút gọn biểu thức sau bằng cách nhanh nhất
A = \(\left(a^2+b^2-c^2\right)^2-\left(a^2-b^2+c^2\right)^2-4a^2b^2\)
B = \(\left(3x^3+3x+1\right)\cdot\left(3x^3-3x+1\right)-\left(3x^3+1\right)^2\)
C = \(\left(2-6x\right)^2+\left(2-5x\right)^2+2\cdot\left(6x-2\right)\cdot\left(2-5x\right)\)
D = \(5\cdot\left(3x-1\right)^2+4\cdot\left(5x+1\right)^2-12\cdot\left(5x-2\right)\left(5x+2\right)\)
E = \(\left(3x-1\right)^2+\left(2x+4\right)\cdot\left(1-3x\right)+\left(x+2\right)^2\)
G = \(\left(x-1\right)^3+4\cdot\left(x+1\right)\cdot\left(1-x\right)+3\cdot\left(x-1\right)\cdot\left(x^2+x+1\right)\)
Rút gọn các biểu thức sau:
A. \(\left(a^2+a-1\right)\left(a^2-a+1\right)\)
B. \(\left(a+2\right)\left(a-2\right)\left(a^2+2a+4\right)\left(a^2-2a+4\right)\)
C, \(\left(2+3y\right)^2-\left(2x-3y\right)^2-12xy\)
D. \(\left(x+1\right)^3-\left(x-1\right)^3-\left(x^3-1\right)-\left(x-1\right)\left(x^2+x+1\right)\)
a) \(^{ }\left(7x+4\right)^2-\left(7x-4\right)\left(7x+4\right)\)
b) \(^{ }8\left(x-2\right)-3\left(x^2-4x-5\right)-5x^2\)
c) \(^{^{ }}\left(x+1\right)^3-\left(x-1\right)\left(x^2+x+1\right)-3x\left(x+1\right)\)
Bài 1 : rút gọn các biểu thức sau
A = \(\left(3x+1\right)^2-2\left(3x+1\right)\left(5x+5\right)+\left(5x+5\right)^2\)
B = \(\left(a+b+c\right)^2+\left(a-b-c\right)^2+\left(b-c-a\right)^2+\left(c-b-a\right)^2\)
C = \(\left(3x+1\right)\left(3x^2+1\right)\left(3x^4+1\right)\left(3x^8+1\right)\left(3x^{16}+1\right)\left(3x^{32}+1\right)\)
thực hiện phép nhân
a) \(\left(X+1\right)\left(1+X-X^2+X^3-X^4\right)-\left(X-1\right)\left(1+X+X^2+X^3+X^4\right)\)
B) \(\left(2b^2-2-5b+6b^3\right)\left(3+3b^2-b\right)\)
c) \(\left(2ab+2a^2+b^2\right)\left(2ab^2+4a^3-4a^2b\right)\)
d) \(\left(2a^3-0,02a+0,4a^5\right)\left(0,5a^6-0,1a^2+0,03a^4\right)\)
BT3: Tìm x
\(a,\left(x+2\right)^2-9=0\)
\(b,x^2-2x+1=25\)
\(c,\left(5x+1\right)^2-\left(5x-3\right)\left(5x+3\right)=30\)
\(d,\left(x-1\right)\left(x^2+x+1\right)+x\left(x+2\right)\left(2-x\right)=5\)
Rút gọn biểu thức:
a) \(\left(x^2-2x+2\right)\left(x^2-2\right)\left(x^2+2x+2\right)\left(x^2+2\right)\)
b) \(\left(a+b+c\right)^2+\left(a+b-c\right)^2+\left(2a-b\right)^2\)
c) \(100^2-99^2+98^2-97^2+...+2^2-1^2\)
d) \(3\left(2^2+1\right)\left(2^4+1\right)...\left(2^{64}+1\right)+1\)
Giup mình nha
Rút gọn biểu thức:
a) \(\left(x^2-2x+2\right)\left(x^2-2\right)\left(x^2+2x+2\right)\left(x^2+2\right)\)
b) \(\left(a+b+c\right)^2+\left(a+b-c\right)^2+\left(2a-b\right)^2\)
c) \(100^2-99^2+98^2-97^2+...+2^2-1^2\)
d) \(3\left(2^2+1\right)\left(2^4+1\right)...\left(2^{64}+1\right)+1\)
Giup mình vs mình dang cần gấp
