Question

a) (7×2 la puterea 2+7 la puterea 2×2 la puterea 3)÷21=?
b) (6 la puterea 2-2 la puterea 3×11)÷10=?
c) (7 la puterea 2× 3 la puterea 3+2×6 la puterea 2)÷2 la puterea 4=?

Answer 1

(7×2 la puterea 2+7 la puterea 2×2 la puterea 3)÷21= 7*2²(1+2)÷21=28×3÷21=4

b) (6 la puterea 2-2 la puterea 3×11)÷10=(36-88)÷10=(-52)÷10=-5,2


c) (7 la puterea 2× 3 la puterea 3+2×6 la puterea 2)÷2 la puterea 4= (49×27 + 72) ÷16= 87,1875