Question

scoate factorul comun apoi calculeaza:b)23+3×23 c)3÷29-3×25 d)2×9+2×1-2×5 e)5×a+5×b. daca a+b=o​

Answer 1

b) 23+3·23 = 23(1+3·1) = 23·4 = 93

c) 3·29-3·25 = 3(29-25) = 3·4 = 12

d) 2·9+2·1-2·5 = 2(9+1-5) = 2·5 = 10

e) 5·a+5·b = 5(a+b) = 5·0 = 0