Question

Phân tích đa thức thành nhân tử:

8x²+18x-5

Answer 1

\(8x^2+18x-5 \)

\(=8x^2-2x+20x-5\)

\(=2x\left(4x-1\right)+5\left(4x-1\right)\)

\(=\left(4x-1\right)\left(2x+5\right)\)

Answer 2

(4x-1)(2x-5)

Answer 3

\(8x^2+18x-5\)

\(=8x^2-2x+20x-5\)

\(=2x\left(4x-1\right)+5\left(4x-1\right)\)

\(=\left(2x+5\right)\left(4x-1\right)\)

Answer 4

8x^2 + 18 - 5 

 = 8x^2 - 2x + 20x - 5 

= 2x ( 4x - 1 ) + 5 ( 4x - 1 )

= ( 4x - 1 ) . ( 2x + 5 )