Question

am.nevoie repede
dau coroanaaaaa
e urgent
va roggggggggggg​

Answer 1

Răspuns:

a) $a^{2}$ = 16 => a=4,

$a^{2}$= 81 => a = 9

$a^{2}$ = 400 => a = 20

b) $a^{2}$ = 25 => a = -5, 5

$a^{2}$ = 49 => a = -7, 7

$a^{2}$ = 144 => a = -12,12

c) $a^{2}$ = 16 => a = -4, 4

$a^{2}$ = 81 => a = -9, 9

$a^{2}$ = 400 => a = -20 , 20

Explicație pas cu pas: