exam Maths Puzzle Numerical Ability

Factor. 3x(x + 2y) + 7(x + 2y) im not sure how far I can take this.
I have 3x^2+6xy+7x+14y am i right or do I need to go more?

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exam Other Question

x/4 - y/11 = -9/44

x/6 - y/13 = -1/26
let f(x) = x3 -8x2 + 17x -9. use the factor theorem to find other solutions to f(x) -f(1) = 0, besides x =1.

Possible answers:

-2, 5
.2, -3
.2, 5
.2, 10

Thanks to anyon