Question

phan tich da thuc thanh nhan tu bang phuong phap tach 

a, x^{2 -} 2x - 3

 

Answer 1

x²-2x-3 = x²-3x+x-3 = x(x-3) + (x-3) = (x+1)(x-3)

CHọn mình nha :)

Answer 2

\(x^2-2x-3\)

\(=x^2+x-3x-3\)

\(=x\left(x+1\right)-3\left(x+1\right)\)

\(=\left(x+1\right)\left(x-3\right)\)

hk tot

^^

Answer 3

\(x^2-2x-3\)

\(=x^2+x-3x-3\)

\(=x\left(x+1\right)-3\left(x+1\right)\)

\(=\left(x+1\right)\left(x-3\right)\)