Question

B) 9la puterea45:9la puterea42-2la puterea 1ori3la puterea3+20la puterea 2​

Answer 1

9⁴⁵ ÷ 9⁴² - 2¹ • 3³ + 20² =

= 9³ - 2 • 27 + 400 =

= 729 - 2 • 27 + 400 =

= 729 - 54 + 400 =

= 675 + 400 =

= 1.075

Answer 2

$9^{45}:9^{42}-2^1*3^3+20^2=\\9^{45-42}-2*27+400=\\9^3-54+400=\\729-54+400=\\675+400=1075$