Question

Efectuați produsele:
a) (x+2)(x+3)=........
b) (x-3)(x+5)=.........
c) (1-2x)(x+7)=........
d) (3x-5y)(4x+2y)=.........

Repede pls dau coroana

Answer 1

Răspuns:

a). =x la2+5x+6

b). x la 2+2x-15

c).  = - 2x la2-13x +7

d). =  12x la2-10y la 2-14 xy

Explicație pas cu pas:

Answer 2

a)(x+2)(x+3)

x×x+3x+2x+2×3

x²+3x+2x+6

x²+5x+6

b)(x-3)(x+5)

x×x+5x-3x-3×5

x²+5x-3x-15

x²+2x-15

c)(1-2x)(x+7)

x+7-2x×x-2x×7

x+7-2x²-14x

-13x+7-2x²

-2x²-13x+7

d)(3x-5y)(4x+2y)

3x×4x+3x×2y-5y×4x-5y×2x

12x²+6xy-20xy-10y²

12x²-14xy-10y²