angelicapatal419 angelicapatal419
  • 12-10-2020
  • Mathematics
contestada

solution of 3x(x-5)=12​

Respuesta :

bri10biondo bri10biondo
  • 12-10-2020

Answer:x=5.7 and 0.7

Step-by-step explanation:

[tex]3x(x-5)=12\\3x^{2} -15x=12\\3x^{2} -15x-12=0\\x=(-b+/-\sqrt{b^{2}-4ac } })/{2a} \\x=(15+\sqrt{15^{2}-4*3*-12 } })/{2*3} \\+x=5.7\\x=(15-\sqrt{15^{2}-4*3*-12 } })/{2*3} \\-x= 0.7\\x=5.7 and 0.7[/tex]

Answer Link
aleahtiffany02
aleahtiffany02 aleahtiffany02
  • 12-10-2020

Answer:

x=1

Step-by-step explanation:

3x(x-5)=12

3x(4x)=12

12x²=12

12x²/12=12/12

x²/x²=1

x=1

Answer Link

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