Question

Stiind ca x=10 si ca y-z=29, calculați.
c)5xy-5xz d)3xy-3xz e)7xy-7xz f)10xy-10xz

Answer 1

Răspuns:

Explicație pas cu pas:

c) 5xy - 5xz =5x(y-z) = 5 ×10 × ( y - z ) = 5 × 10 × 29 = 50×29 = 1 450

d) 3xy - 3xz = 3x(y-z) = 3×10×29 = 30×29 = 870

e) 7xy - 7xz = 7x(y-z) =7×10×29 = 70×29 =2 030

f)  10xy - 10xz = 10x(y-z) = 10×10×29 = 100×29 = 2 900