Sửa đề:
Cách 1:
\(\left(5x-1\right)^2+2.\left(1-5x\right).\left(4+5x\right)+\left(5x+4\right)^2\)
\(=\left(1-5x\right)^2+2.\left(1-5x\right).\left(5x+4\right)+\left(5x+4\right)^2\)
\(=\left(1-5x+5x+4\right)^2\)
\(=5^2\)
\(=25\)
Cách 2:
\(\left(5x-1\right)^2+2.\left(1-5x\right).\left(4+5x\right)+\left(5x+4\right)^2\)
\(=\left(5x-1\right)^2-2.\left(5x-1\right).\left(5x+4\right)+\left(5x+4\right)^2\)
\(=\left(5x-1-5x-4\right)^2\)
\(=\left(-5\right)^2\)
\(=25\)
Rút gọn biểu thức:
P = \(\left(5x-1\right)+2\left(1-5x\right)\)\(\left(4+5x\right)+\left(5x+4\right)^2\)
Rút gọn biểu thức bằng cách nhanh nhất
\(5\left(3x-1\right)^2+4\left(5x+1\right)^2-12\left(5x-2\right)\left(5x+2\right)\)
rút gọn biểu thức \(\left(4+3x\right)^2-\left(5x-3\right)\left(5x+3\right)\)
Rút gọn các biểu thức:
\(P=\)\(\left(5x-1\right)^2+2\left(1-5x\right)\left(4+5x\right)+\left(5x+4\right)^2\)
\(Q=\)\(\left(x-y\right)^3+\left(y+x\right)^3+\left(y-x\right)^3-3xy\left(x+y\right)\)
Rút gọn biểu thức
a, \(A=\left(x+2\right)^2+4\left(x+2\right)\left(x-2\right)+\left(x-4\right)^2\)
b, \(B=\left(3x^2-2x+1\right)\left(3x^2+2x+1\right)-\left(3x^2+1\right)^2\)
c, \(C=\left(x^2-5x+2\right)^2-2\left(x^2-5x+2\right)\left(5x-2\right)+\left(5x-2\right)^2\)
rút gọn biểu thức
A=\(\left(9x-1\right)^2+\left(1-5x\right)^2+2\left(9x-1\right)\left(1-5x\right)\)
Rút gọn các biểu thức sau:
a/\(\left(3x-1\right)^2-2\left(2-5x\right)^2-2\left(x^2+x-1\right)\left(x-1\right)\)
b/\(\left(3a-1\right)^2+2\left(9a^2-1\right)+\left(3a-1^{ }\right)^2\)
c/\(\left(3x-4^{ }\right)^2+\left(4-x\right)^2-2\left(3x-4\right)\left(x-4\right)\)
Rút gọn các viểu thức sau:
a) \(P=\left(5x-1\right)+2\left(1-5x\right)\left(4+5x\right)+\left(5x+4\right)^2\)
b) \(Q=\left(x-y\right)^3+\left(y+x\right)^3+\left(y-x\right)^3-3xy\left(x+y\right)\)
Làm giúp mình nhé!
rút gọn biểu thức
a) \(x\left(2x^2-3\right)-x^2\left(5x+1\right)+x^2\)
b) \(3x\left(x-2\right)-5x\left(1-x\right)-8\left(x^2-3\right)\)
