1.- Resuelve las siguientes Ecuaciones.
X2 - 5x = 0
X2 - 16 = 0
X2 - 49 = 0
2x2 - 18 = 0
3х2 - 11 = 0
-X2 - x = 0
-X2 + 12x = 0
3x2 - 9x = 0
X2 - 2x - 3 = 0
Me ayudan :,v
Respuestas
Respuesta:
espero te ayude :D (perdón la demora)
Explicación paso a paso:
1) X2 - 5x = 0
= − ( − 5 ) ±√ ( − 5 ) 2 − 4 ⋅ 1 ⋅0/2
= 5 ± 5 ÷ 2
= 5 + 5 ÷ 2
= 5 - 5 ÷ 2
= 5
= 0
2) X2 - 16 = 0
= − 0 ± √0² − 4 ⋅ 1( − 1 6 ) /2.1
= 0±8 ÷ 2
= 0+8÷2
= 0-8÷2
= 4
= -4
3) X2 - 49 = 0
= − 0 ± √0 ² − 4 ⋅ 1 ( − 4 9 ) / 2 ⋅ 1
= 0 ±4÷2
= 0 + 14 ÷ 2
= 0 - 14 ÷ 2
= 7
= -7
4) 2x2 - 18 = 0
2 ( 2²− 9 )= 0
² - 9 = 0
= − 0 ± √0 ² − 4 ⋅ 1 ( − 9)/ 2.1
= 0 ±6÷2
= 0+6÷2
= 0-6÷2
=3
=-3
5) 3х2 - 11 = 0
= − 0 ±√ 0 ² − 4 ⋅ 3 ( − 1 1 )
= 0±2√33÷6
= 0+2√33÷6
= 0-2√33÷6
= √33÷3
= -√33÷3
6) -X2 - x = 0
− ( ² + ) = 0
² += 0
= − 1 ±√ 1 ² − 4 ⋅ 1 ⋅ 0/ 2.1
=-1±1÷2
=-1+1÷2
=-1-1÷2
= 0
= -1
7) -X2 + 12x = 0
− ( 2²− 1 2 ) = 0
² − 1 2 = 0
= − ( − 1 2 ) ±√ ( − 1 2 ) ² − 4 ⋅ 1 ⋅ 0
= 1 2 ± 1 2÷2
= 1 2 + 1 2÷2
= 1 2 − 1 2÷2
=12
= 0
8) 3x2 - 9x = 0
3 ( ² -3 )= 0
0 ² − 3 = 0
= − ( − 3 ) ±√ ( − 3 ) ²− 4 ⋅ 1 ⋅ 0
= 3 ± 3÷2
= 3 + 3÷2
= 3 − 3÷2
=3
=0
9) X2 - 2x - 3 = 0
= − ( − 2 ) ±√ ( − 2 ) ² − 4 ⋅ 1 ( − 3 )
= 2 ± 4÷2
= 2 + 4÷2
= 2 - 4÷2
=3
= -1