Question

Doar ex. 1 punctul a pentru E(x)

Answer 1

grupam cate 2 termeni si scoatem factor comun=>E(x)=x²(x-5)-4(x-5)=(x-5)(x²-4)=(x-5)(x-2)(x+2)

Answer 2

a)$x^3-5x^2-4x+20=x^2(x-5)-4(x-5)=(x-5)(x^2-4)=\\=(x-5)(x-2)(x+2)$