Question

I.Descompuneți în factori : a) 8x³+12x b) 9x la a cinci a -6x4+12x³ c) (x+2)(x-5)+5(x+2) d) (x-4)²+(3-2x)(4-x) e) 25y² - 49 f)x² +8x+16​

Answer 1

Răspuns:

a) 8x³+12x=4x(2x²+3)

b) 9x⁵-6x⁴+12x³=3x³(3x²-2x+4)

c) (x+2)(x-5)+5(x+2)=x+2(x-5+5)=x(x+2)

d)25y²-49=(5y-7)(5y+7)

e) x²+8x+16=(x+4)²