Câu a :
\(\left(x-5\right)^2+\left(x-5\right)\left(x+5\right)-\left(5-x\right)\left(2x+1\right)\)
\(=x^2-10x+25+x^2-25-10x-5+2x^2+x\)
\(=4x^2-19x-5\)
Câu b :
\(\left(3x-2\right)\left(4x-3\right)-\left(2-3x\right)\left(x-1\right)-2\left(3x-2\right)\left(x+1\right)\)
\(=12x^2-9x-8x+6-2x+2+3x^2-3x-6x^2-6x+4x+4\)
\(=9x^2-24x+2\)
phan tich da thuc thanh nhan tu ;
\(3x^2-3y^2-2\left(x-y\right)^2\)
phan tich da thuc thanh nhan tu :
\(3x^2-3y^2-2\left(x-y\right)^2\)
CM biểu thức ko phụ thuộc vào biến
\(\left(x^2-3x+5\right)^2-2\left(x^2-3x+5\right)\left(x^2-3x-1\right)+\left(x^2-3x-1\right)^2\)
Phân tích đa thức thành nhân tử
1) \(3x^2-16x+5\)
2) \(3x^3-14x^2+4x+3\)
3) \(x^8+x^7+1\)
4) \(64x^4+y^4\)
5) \(\left(x+a\right)\left(x+2a\right)\left(x+3a\right)\left(x+4a\right)+a^4\)
6) \(\left(x^2+y^2+z^2\right)\left(x+y+z\right)^2\left(xy+yz+zx\right)\)
Phân tích đa thức thành nhân tử
\(1,\left(x-1\right)\left(2x+1\right)+3\left(x-1\right)\left(x+2\right)\left(2x+1\right)\)
\(2,\left(x-5\right)^2+\left(x+5\right)\left(x-5\right)-\left(5-x\right)\left(2x+1\right)\)
Rút gọn biểu thức :
a, \(\left(x-1\right)^3-\left(x-1\right)\left(x^2+x+1\right)\)
b,\(\left(x-3\right)^3-\left(x-3\right)\left(x^2+3x+9\right)+6\left(x+1\right)^2\)
Phân tích đa thức thành nhân tử
a) \(4x^4+y^4\)
b) \(\left(x^2-3x-1\right)^2-12\left(x^2-3x-1\right)+27\)
c) \(x^3-x^2-5x+125\)
d) \(xy\left(x+y\right)+yz\left(y+z\right)+zx\left(z+x\right)+2xyz\)
Tìm x:
a) \(x\left(x-1\right)+x-1=0\)
b) \(3\left(x-3\right)-4x+12=0\)
c) \(x^3-5x=0\)
d) \(\left(3x-2\right)^2-\left(x+2\right)^2=0\)
e) \(x^2-9-4\left(x+3\right)=0\)
f) \(2\left(x-2\right)-x^2+4x-4=0\)
- \(^{x^4-\left(x+1\right)x^3+\left(x+1\right)x^2-\left(x+1\right)x+4\left(x>=0\right)}\)
- \(x^2-3x^2-4x+12\)
- \(x^4-4-4x^2-x^2\)
- ( x + y+z)^3 -\(x^3-y^3-z^3\)
nhanh nha
