Question

calculati:
a) (3 la puterea 2*2 la puterea 6-2 la puterea 5*6):12-2 la puterea 5
b) (7 la puterea 4-7 la puterea 3):(7 la puterea 2-7)-2 la puterea 3*5

VA ROG FRUMOS
ESTE PENTRU MAINE TEMA

Answer 1

$a)( {3}^{2} \times {2}^{6} - {2}^{5} \times 6) \div 12 - {2}^{5}$

$= (9 \times 64 - 32 \times 6) \div 12 - 32$

$= (576 - 192) \div 12 - 32$

$= 384 \div 12 - 32$

$= 32 - 32$

$= 0$

$b)( {7}^{4} - {7}^{3} ) \div ( {7}^{2} - 7) - {2}^{3} \times 5$

$= [ {7}^{3} (7 - 1)] \div [7(7 - 1)] - 8 \times 5$

$= ( {7}^{3} \times 6) \div (7 \times 6) - 40$

$= ( {7}^{3} \div 7)(6 \div 6) - 40$

$= {7}^{3 - 1} \times 1 - 40$

$= {7}^{2} - 40$

$= 49 - 40$

$= 9$