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va rog din suflet am nevoie urgentt​

Va Rog Din Suflet Am Nevoie Urgentt class=

Răspuns :

Răspuns:

4.

a)8x-12x²=2x³-3x×4x=2x×2x×2x-3x×4x

b)36x²-y²=6x×6x-y×y

c)9x²+30x+25=9x×9x+3x×2x×5x+5×5=3x×3x×3x×3x+3x×2x×5x+5×5

d)x²-4x-12=x×x-2x×2x-3×4