It is 7. None of the other ones fit at all
9.3 × 107 would be the scientific notation
(x+3y) (x-3y) = x^2 9y^2
(x-y) (x+3y) = x^2+2xy-3y^2
(xy+9y+2) (xy-3) = x^2 y^2 +9xy^2-xy-27y-6
(x^2+3xy-2) ( xy+3) = x^3 y+3x^2 y^2 +7xy-6
(2xy+x+y) (3xy^2-y) = 6x^2 y^3 +3x^2 y^2 +xy^2-2xy^2-xy-y^2
(xy+3x+2) ( xy-9) = x^2 y^2 +3x^2 y -7xy-27x-18
Answer:
<h2>
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</h2>
Step-by-step explanation:

Write all the numerators above the least common denominator
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Multiply the parentheses

Distribute 3x through the parentheses
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Collect like terms
Hope this helps...
Good luck on your assignment...
Answer:
-9
Step-by-step explanation:
a(2) = a(1)+4 = -13+4 = -9