\(x^3-x^2-x-2=x^3-2x^2+x^2-2x+x-2\) \(-2\)
\(=\) \(x^2\left(x-2\right)+x\left(x-2\right)+\left(x-2\right)\)
\(=\left(x^2+x+1\right)\left(x-2\right)\)
\(x^3-6x^2-x+30=x^3+2x^2-8x^2-16x+15x+30\)
\(=x^2\left(x+2\right)-8x\left(x+2\right)+15\left(x+2\right)\)
\(=\) \(\left(x^2-8x+15\right)\left(x+2\right)\)
\(=\left(x^2-5x-3x+15\right)\left(x+2\right)\)
\(=\left(x-5\right)\left(x-3\right)\left(x+2\right)\)
phan tich thanh nhan tu(bang ki thuat tach hang tu)
1)-8x^2+5x+3
2)-10x^2-17x+6
phan tich da thuc thanh nhan tu
x^2-x-y^2-y
x^2-2xy+y^2-z^2
bai 32 va 33 sbt
lop 8 bai phan tich da thuc thanh nhan tu bang cach nhom hang tu
phan tich da thuc thanh nhan tu bang cach them bot cung 1 hang tu;
\(x^8+x^4+1\)
phan tich da thuc thanh nhan tu bang cach them bot cung 1 hang tu
:\(x^3+x^2+4\)
phan tich da thuc thanh nhan tu bang cach them bot cung 1 hang tu;
\(x^3-2x-4\)
phan tich thanh nhan tu(bang ki nang tach hang tu)
1) 3x^2 +7x-6
2)6x^213x+6
3)8x^2+5x+3
phan tich da thuc thanh nhan tu bang phuong phap tach
a, x2 - 2x - 3
Phan tich thanh nhan tu ( bang ki thuat bo sung hang dang thuc):
x^2-4xy-x+3y^2+3y
x^2+4xy+2x+3y^2+6y
6x^2+xy-7x-2y^2+7y-5
6a^2-ab-2b^2+a+4b
1)2x^2-4xy+2y^2-32
2)5x^2-5y^2-x+y
3)x^2-9xy+20y^2
4)4x^2(x+y)-x-y
5)16+ty^2+6xt-9t+x^2
Giai bang phuong phap phan tich thanh nhan tu chung bang cach nhom hang tu.
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