What are the solutions to the equation?

3x^2+6x=45

enter your answers in the boxes.

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

i think it would be 42cm

f(x)=2/3x-8, which give g(x) the greatest value.

step-by-step explanation: