Question

Cum se descompune??? Dau coroana

Answer 1

3x²+x²-3x-1=

3x²-3x +x²-1=

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

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

(x-1)(4x+1)

Answer 2

${4x}^{2} - 3x - 1 \\ \\ {4x}^{2} + ( - 4 + 1)x - 1 \\ \\ {4x}^{2} + ( - 4x + x) - 1 \\ \\ {4x}^{2} - 4x + x - 1 \\ \\ ( {4x}^{2} - 4x) + (x - 1) \\ \\ 4x(x - 1) + 1(x - 1) \\ \\ (x - 1)(4x + 1)$