Question

Efectueaza: a)19 la puterea 0 +17 - (17-16)la puterea 2=




b)2 la puterea 2 × 5+2 la puterea 2×7 -2 la puterea 2×9=




c)8 la putere 2 - 7 la puterea 2 × 7 la puterea 0 -15=

Answer 1

$a) {19}^{0} + 17 - {(17 - 16)}^{2}$

$= 1 + 17 - {1}^{2}$

$= 18 - 1$

$= 17$

$b) {2}^{2} \times 5 + {2}^{2} \times 7 - {2}^{2} \times 9$

$= {2}^{2} (5 + 7 - 9)$

$= 4(12 - 9)$

$= 4 \times 3$

$= 12$

$c) {8}^{2} - {7}^{2} \times {7}^{0} - 15$

$= 64 - 49 \times 1 - 15$

$= 64 - 49 - 15$

$= 15 - 15$

$= 0$

Answer 2

A. 19^0+17-(17-16)^2=1+17- 1^2=18-1=17

B. 2^2×5+2^2×7-2^2×9=4×5+4×7-4×9=20+28-36=48-36=12

C.8^2-7^2×7^0-15=64-49×1-15=64-49-15=15-15=0