Răspuns:
descompune in factori următoarele expresii algebrice:
a)3x-3y = 3(x - y)
âb)x²y+2xy² = xy(x + 2y)
c) x²+6×+9 = (x +3)(x + 3)
d) 4ײ-1 = (2x - 1)(2x + 1)
calculează folosind formule de calcul prescurtat:
a) 29²+42×29+21² = (29 + 21)² = 50² = 2500
b) 253²-153²
= (253 + 153)(253 - 153) = 406 x 100 = 40600
descompune in factori
a) 3׳y-6x²y²+3xy = 3xy(x² - 2xy + 1) = 3xy(x-1)(x - 1)
b) xy+x+y+1 = x(y + 1) + y + 1 = (y + 1)(x + 1)
c) x⁴-16 = (x² - 4)(x² + 4) = (x - 2)(x + 2)(x² + 4)
#copaceibrainly
