Question

phân tính thành nhân tử x^2-7x+18

Answer 1

 \(x^2+7x+18=x^2-9x-2x+18=x\left(x-9\right)-2\left(x-9\right)=\left(x-2\right)\left(x-9\right)\)

Answer 2

 

Ta có  x2−7x+10=x2−2x−5x+10x2−7x+10=x2−2x−5x+10=x(x−2)−5(x−2)=(x−5)(x−2)

Answer 3

Ta có  x^2−7x+10

=x2−2x−5x+10x2−7x+10

=x2−2x−5x+10

=x(x−2)−5(x−2)=(x−5)(x−2)