Question

Imi trebuie 1,2,3,4 repede
DAU COROANA

Answer 1

1)

(2.42:4+6.28):1.35=(0.605+6.28):1.35=6.885:1.35=5.1 (punctul c)

2)

-4^73:2?^144=-4^73:4^72=-4*4^72:4^72=-4*1=-4

25^12:5^23=25^12:(5^22*5)=25^11:25^11=25^0=1

-4-1=-5  (punctul c)

3)

(4x-3)^2-(2x-1)^2= (16x^2-24x+9)-(4x^2-4x+1)=16x^2-24x+9-4x^2+4x-1=12x^2-20x+8 =4(3x-2)(x-2) (punctul B)

4)

50 caiete= 6kg hartie

25 caiete=3 kg hartie

175 caiete = 7*25 caiete= 7*3 kg hartie= 21 kg hartie