Who wants to be my friend

Find the missing factor. 7s2 + 25s + 12 = (s + 3)( ).

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?