The greatest common factor of group 1 will be 2x so option C is correct.
What is a quadratic equation?
The polynomial having a degree of two or the maximum power of the variable in a polynomial will be 2 is defined as the quadratic equation and it will cut two intercepts on the graph at the x-axis.
The solution of the given equation will be as follows:-
= 2x² + 6x + 5x + 15
= 2x ( x + 3 ) + 5 ( x + 3 )
= ( x + 3 ) ( 2x + 5 )
We can see in the second step the first group have a common factor of 2x.
Therefore greatest common factor of group 1 will be 2x so option C is correct.
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