Question 610801
(-4t-4v)(-5t-5v)


(-4t)*(-5t) + (-4t)*(-5v) + (-4v)*(-5t) + (-4v)*(-5v)


20t^2 + 20vt + 20vt + 20v^2


20t^2 + 40vt + 20v^2


So (-4t-4v)(-5t-5v) expands and simplifies to 20t^2 + 40vt + 20v^2

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