Question

X elevado a 2 +3x-70=0​

Answer 1

Resposta:

S={ -7 ; 10}

Explicação passo-a-passo:

x²+3x-70=0

a=1

b=3

C=-70

∆=b²-4.a.c

∆=(3)²-4.(1).(-70)

∆=9+280

∆=289

x'=[-(3)+√289]/2=[-3+17]/2=14/2=7

x"=[-(3)-√289]/2=[-3-17]/2=-20/2=-10