Răspuns:
¬ 2x²-6x+x-3+x²-4x+4-3x²+12x=2x²-6x+x-37
-9x+1=2x²-5x-37
-2x²-9x+5x= - 1-37
-2x²-4x= - 38 / :2x
-x-2= - 19
-x= 2-19
-x= - 17 / ×(-1)
X= 17
¬ a) 2x²y × 4xy³= 8x³y⁴
b) 5xy-2,7xy= 2,3xy
c) (-21b²a^6) : (7b²a³) = - 3a³
d) (3cd)²= 9c²d²
¬ a). a²-4ab+4b²= (a-2b)²
b) 9c²+6cd+d²= (3c+d)²
c) x²-4y² = (x-2y)(x+2y)
Explicație pas cu pas:
Sper ca te am ajutat!!
