Question

Descompuneti in factori:
A)x^2-3x+2
C)x^2-4x+3
D)x^2-5x+6
F)x^2-7x+10
G)x^2-9x+20
I)x^2-8x+7

Answer 1

A)x²-3x+2 =x²-2x-x+2 =x(x-2)-(x-2)=(x-2)(x-1)

C)x²-4x+3=x²-3x-x+3= x(x-3)-(x-3)=(x-3(x-1)

D)x²-5x+6=x²-3x-2x+6 =x(x-3)-2(x-3)=(x-3)(x-2)

F)x²-7x+10=x²-5x-2x+10=x(x-5)-2(x-5)=(x-5)(x-2)

G)x²-9x+20=x²-5x-4x+20=x(x-5)-4(x-5)=(x-5)(x-4)

I)x²-8x+7 =x²-7x-x+7 =x(x-7)-(x-7)=(x-7)(x-1)