exam Maths Puzzle Numerical Ability

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exam Other Question

Please help me solve the following...
log6(6 is lower than the g) (x+3) + log6(6 is lower to the g)(x+4)=1
I have a question. I am supposed to find the GCF of each product.

(6y^2 - 3y) (y + 7)

I got 3y (3y + 7) when I worked it out but I am not showing a GCF could you please help me with this problem? Thanks