Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(3x^2-5x-2\)
\(=3x^2+x-6x-2\)
\(=x\left(3x+1\right)-2\left(3x+1\right)\)
\(=\left(x-2\right)\left(3x+1\right)\)
3x2 - 5x - 2
= 3x2 + x - 6x - 2
= x(3x + 1) - 2(3x + 1)
= (3x + 1)(x - 2)
Sửa đề chút:
\(x^3+5x^2+3x-9\)
\(=\left(x^3-x^2\right)+\left(6x^2-6x\right)+\left(9x-9\right)\)
\(=x^2\left(x-1\right)+6x\left(x-1\right)+9\left(x-1\right)\)
\(=\left(x-1\right)\left(x^2+6x+9\right)\)
\(=\left(x-1\right)\left(x+3\right)^2\)
hình như đề là x3-5x2+3x+9 mới đúng bn ạ
x3-5x2+3x+9= x3+x2-6x2-6x+9x+9
=x2(x+1)-6x(x+1)+9(x+1)
=(x+1)(x2-6x+9)
=(x+1)(x-3)2
\(3x^2+5x-2\)
\(=3x^2+6x-x-2\)
\(=3x\left(x+2\right)-\left(x+2\right)\)
\(=\left(3x-1\right)\left(x+2\right)\)
Hok tốt !
\(3x^2+5-2\)
\(=3x^2+6x-x-2\)
\(=3x\left(x+2\right)-\left(x+2\right)\)
\(=\left(3x-1\right)\left(x+2\right)\)
\(\left(3x^2-3xy\right)-\left(5x-5y\right)\)
\(=3x\left(x-y\right)-5\left(x-y\right)\)
\(=\left(x-y\right)\left(3x-5\right)\)
\(\left(3x^2-3xy\right)-\left(5x-5y\right)\)
=\(3x\left(x-y\right)-5\left(x-y\right) \)
=\(\left(x-y\right)\left(3x-5\right)\)
\(=\left(3x^2-3xy\right)+\left(5y-5x\right)\)
\(=3x\left(x-y\right)+5\left(y-x\right)\)
\(=3x\left(x-y\right)-5\left(x-y\right)\)
\(=\left(3x-5\right)\left(x-y\right)\)
Ta có:
\(3x^2+5y-3xy-5x\)
\(=\left(3x^2-3xy\right)+\left(5y-5x\right)\)
\(=3x\left(x-y\right)-5\left(x-y\right)\)
\(=\left(3x-5\right)\left(x-y\right)\)
dễ ẹc!!!!!!!!
- Dễ Thì Lm Đii Saoo Ns Kh V Đc Nè :))