\(\left(x-3\right)\left(x+3\right)-\left(x+5\right)\left(x-1\right)-\left(x-4\right)^2\)
\(=x^2-9-x^2-4x+5-x^2+8x-16\)
\(=-x^2+4x-20\)
Rút gọn
a) \(x.\left(x+4\right).\left(x-4\right)-\left(x^2+1\right).\left(x-1\right)\)
b) \(\left(y-3\right).\left(y+3\right).\left(y^2+9\right)-\left(y^2+2\right).\left(y^2-2\right)\)
Rút gọn :
\(\left(x-2\right)^3-\left(x-1\right)^2+\left(x-3\right)\left(3-x\right)\)
Rút gon
\(\left(x-3\right)\left(x+3\right)-\left(x+5\right)\left(x-1\right)-\left(x-4\right)^2\)
rút gọn
a)\(\left(7x-8\right).\left(7x+8\right)-10.\left(2x+3\right)^2+5x.\left(3x-2\right)^24x.\left(x-5\right)^2\)
b) \(\left(3x+7\right)^3-\left(5x-y\right).\left(25x^2+5xy+y^2\right)+\left(x+2y\right)^3\)
Rút gọn biểu thức :
\(\frac{x^3-53x+88}{\left(x-1\right)\left(x-3\right)\left(x-5\right)\left(x-7\right)+16}\)
Giúp tôi với
Rút gọn:
a) P = \(\frac{bc}{\left(a-b\right)\left(a-c\right)}+\frac{ca}{\left(b-c\right)\left(b-a\right)}+\frac{ab}{\left(c-a\right)\left(c-b\right)}\)
b) Q = \(\frac{\left(x+\frac{1}{x}\right)^6-\left(x^6+\frac{1}{x^6}\right)-2}{\left(x+\frac{1}{x}\right)^3+x+\frac{1}{x^3}}\)
Giúp mik nhé!
Rút gọn rồi tính A vs x =2
\(A=\left(7x-8\right).\left(7x+8\right)-10.\left(2x+3\right)^2+5x.\left(3x-2\right)^2-4x.\left(x-5\right)^2\)
1. Viết biểu thức dưới dạng bình phương của một tổng
\(2xy^2+x^2y^4+1\)
2, Rút gọn biểu thức :
a, \(2\left(x-y\right)\left(x+y\right)+\left(x+y\right)^2+\left(x-y\right)^2\)
b, \(\left(x-y+z\right)^2+\left(z-y\right)^2+2\left(x-y+z\right)\left(y-z\right)\)
Tim x
a) \(\left(4x+3\right).\left(4x-3\right)-\left(4x-5\right)^2=46\)
b) \(\left(x+1\right)^3+2x-\left(x-1\right)^3-3.\left[\left(x+1\right)^2+\left(x-1\right)^2\right]+5=0\)
