Question

ma ajutati la exercițiile 3,4,5 dau coroana

Answer 1

a)3×5+7×a+b=
=15+7×13=
=15+91=
=106

b)5×a+5xb-50=
=5×a+b-50=
=5×13-50=
=65-50=
=15

c)10×5+(4×a+4×b)=
=50+(4×13)=
=50+52=
=102

d)(4×a+4×b-2×x)×(2×a+2×b+x)=
=(4×13-2×5)×(2×13+5)=
=(52-10)×(26+5)=
=42×31=
=1302