determinati a∈R pentru care enunturile de mai jos devin propozitii adevarate: a)ecuatia 2x+a=0 are solutia-5 b)ecuatia -ax+12=0 are solutia 1 c)ecuatia ax+a=0 are solutia 2
a) 2x+a=0 are ca solutie -5 <=> 2*(-5) +a =0 => -10+a=0 => a=10. b) -ax+12=0 are ca solutie 1 <=> -a+12=0 => a=12 c) ax+a=0 are ca solutie 2 <=> 2a+a=0 => 3a=0 => a=0
