Question

aflati numerele antregi x astfel ancat x la a 2=64 si x la a 2=144

Answer 1

x² = 64 
x = √64 
x = + - 8 

x² = 144 
x = √144
x = + - 12 

Answer 2

$x^{2}=64~ =>x=\sqrt{64}=$±$8~=>x$ €{$-8; 8$}

$x^{2}=144~ =>x=\sqrt{144}=$±$12~=>x$ €{$-12; 12$}