Seudónimo Seudónimo
  • 18-02-2019
  • Mathematics
contestada

What are the solutions to the equation?

3x^2+6x=45

Enter your answers in the boxes.

What are the solutions to the equation 3x26x45 Enter your answers in the boxes class=

Respuesta :

reallyfedoll reallyfedoll
  • 18-02-2019

x= 3,-5

hope this helps

Answer Link
dhiab
dhiab dhiab
  • 18-02-2019

Answer:

Step-by-step explanation:

3x² +6x = 45

divid by : 3 :

x² +2x = 15

(x² +2x +1 )-16 = 0

( x + 1 )² - 4² = 0

note : a² - b² = (a - b ) ( a + b)  ...idetity

( x +1 -4)( x + 1 +4) = 0

(x -3 ) ( x+5) =0

x-3 = 0 or x +5 = 0

x = 3  or x = - 5

my answer in the boxes :   x = 3 and x = -5

Answer Link

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