Răspuns:
Explicație pas cu pas:
b)=3x(3x-1)
d)=2x²(7x+1)
f)=8x³(3x²+2)
b) 4x³(3x²+2x-1)=4x³[(x²-1)+(2x²+x)]=4x³(x+1)(x-1+2x)=4x³(x+1)(3x-1)
d) 7x^4(4x^4-3x²+2)
4t²-3t+2=0 t1,2=3±√9-32/8 nu are solutii reale
f)8x^4(3x^5-6x^4+4)
b)(x+3)(x-2-2)=(x+3)(x-4)
d) (x+7)(x+5+6)=(x+7)(x+11)
b) (x-1)(3x+2+1-2x)=(x-1)(x+3)
d)(5x-3)(4x+1-6x-3)=(5x-3)(-2x-2)=(3-5x)(x+1)
b) (x-2)(x-2+3-5x)=(x-2)(1-4x)
d) (x+4) (6x+1-x-4)=(x+4)(5x-3)
