Question

X²+3x-4=0 resolva me ajudem​

Answer 1

Resposta: -4

Explicação passo-a-passo:

x2+ 3 x - 4 = 0

( 1 ) ⋅x2+ ( 3 ) ⋅ x + ( - 4 ) = 0

x =- ( 3 ) ±( 3 )2- 4 ⋅ ( - 4 )------------√2

x =- 3 ±9 - ( - 16 )---------√2

x =- 3 ±25--√2

x =- 3 ± ( 5 )2

x1=22=( 2 )( 2 )= 1

x2=- 82=( 2 )⋅ ( - 4 )( 2 )= - 4