Question

phan tích đa thức thành nhân tử :
x^2 - 5x - 14

Answer 1

x^2-5x-14= x^2 - 7x +2x -14=  x(x-7) +2(x-7)=(x-7)(x+2)

Answer 2

x²-5x-14=x²-7x+2x-14=x(x-7)+2(x-7)=(x+2)(x+7)

Answer 3

\(x^2-5x-14\)

\(=x^2+2x-7x-14\)

\(=x\left(x+2\right)-\left(7x+14\right)\)

\(=x\left(x+2\right)-7\left(x+2\right)\)

\(=\left(x-7\right)\left(x+2\right)\)

Answer 4

\(x^2-5x-14\)

\(=x^2+2x-7x-14\)

\(=x\left(x+2\right)-7\left(x+2\right)\)

\(=\left(x-7\right)\left(x+2\right)\)

Answer 5

\(x^2-5x-14\)

\(=x^2+2x-7x-14\)

\(=x\left(x+2\right)-7\left(x+2\right)\)

\(=\left(x+2\right)\left(x-7\right)\)