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Mirunastefania8
a fost răspuns

-x-(-2x-3)²=-4x²-3(x-2)

Răspuns :

Albatran
inmultim cu (-1)
x+(-2x-3)²=4x²+3(x-2)
 tinem cont ca (-a-b)²= [(-1) (a+b)]²= (-1)²(a+b)²=1*(a+b)²= (a+b)²
 x+(2x+3)²=4x²+3x-6
 x+4x²+12x+9=4x²+3x-6
13x+9=3x-6
13x-3x=-6-9
10x=-15
2x=-3
x=-3/2
care verifica ecuatia

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