Question

1.Stiind ca x=12 , det3rminati valoarea expresiei E=(x+1)+3×(×-5) .
2. Stiind ca x=13 si a+b=17 , calaculati valoarea expresiei x×a+x×b .
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Answer 1

E=(12+1)+3*12(12-5)=13+36*7=13+252=265
13*a+13*b=13*(a+b)=13*17=221

Answer 2

1. E=(x+1)+4×(x-5)
E=(12+1)+3×(12-5)
E=13+3×8
E=13+24
E=37
2. x×a+x×b=x×(a+b)
13×17=221