I believe the answer to your question is b.
Answer:

Step-by-step explanation:
Answer:
You distribute the 2xy and get
2xy(3xy + 5y - xy^2) = 6(x^2)(y^2) + 10xy^2 - 2(x^2)(y^3)
ANSWER


EXPLANATION
The given triangle has a right angle.
The side opposite to the 45° angle is 7 units.
To find angle x, we use the tangent ratio.
Recall the mnemonics TOA, which means,




To find y, we use the sine ratio, which means






3 = 3
10=2 x 5
15=. 5 x 3
lcm=2x5x3=30