This is similar to Problem 2 from your Section 4.3 worksheet.

Factor out the GCF.

$6 a(x-9 y)+9 b(x-9 y) = \big($ $\big) \big($ $\big)$

$x^2(r-3 s)+y^2(r-3 s) = \big($ $\big) \big($ $\big)$

$(x-3)(6 x - 7)+x(6 x - 7) = \big($ $\big) \big($ $\big)$

Hint:

Hint: