Question

1) Phân tích thành X Tử

a) 3x^2 + 13x + 10

b) x^2 - 10x + 21

c) 6x^2 - 5x + 1

Help me !! Cần gấp

Answer 1

a) \(3x^2+13x+10\)

\(=3x^2+3x+10x+10\)

\(=3x.\left(x+1\right)+10.\left(x+1\right)\)

\(=\left(3x+10\right).\left(x+1\right)\)

b) \(x^2-10x+21\)

\(=x^2-3x-7x+21\)

\(=x.\left(x-3\right)-7.\left(x-3\right)\)

\(=\left(x-7\right).\left(x-3\right)\)

c) \(6x^2-5x+1\)

\(=6x^2-3x-2x+1\)

\(=3x.\left(2x-1\right)-1.\left(2x-1\right)\)

\(=\left(3x-1\right).\left(2x-1\right)\)

P/s: Không chắc chắn lắm vì dạng này em mới làm quen ...