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stiind ca a=10 si b= 7 calculati (a+b)×(2×a+5-3×b)​

Răspuns :

(a+b)×(2×a+5-3×b)=

=(10+7)×(2×10+5-3×7)=

=17×(20+5-21)=

=17×(25-21)=

=17×4=68

a=10

b= 7

( 10+7) × ( 2×10+5-3×7)=

17 × ( 20 +5-21) =

17 × ( 25-21 )=

17×4=68