Question

10 exercitii rezolvate cu formula:
(a+b)(c+d)=a×c+a×d+b×c+b×d​

Answer 1

Răspuns:

(1+2)(3+4)=1×3+1×4+2×3+2×4=21

(1+3)(2+4)=1×2+1×4+3×2+3×4=24

(1+4)(3+2)=1×3+1×2+4×3+4×2=26

(1+5)(2+3)=1×2+1×3+5×2+5×3=30

(1+6)(3+4)=1×3+1×4+6×3+6×4=45

(1+7)(2+4)=1×2+1×4+7×2+7×4=48

(1+8)(3+2)=1×3+1×2+8×3+8×2=46

(1+9)(2+3)=1×2+1×3+9×2+9×3=50

(1+10)(3+4)=1×3+1×4+10×3+10×4=77

(1+11)(2+4)=1×2+1×4+11×2+11×4=72

Sper sa te ajute❤