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$$ 24 a^{2}-6 a b-30 b^{2} $$

Number 13. The sentence in question is after they gained independence from the Turks, they began to demands the sculptures and carvings back from the British to no avail. What we get to mess with is this pronoun. If we're going to call them they who are if we're gonna call them by their name. The Turks were the Greeks.

So the fact that we get even to debate that into calling them they versus calling them Turks or Greeks is an indication that we're playing with this rule. Pronoun ambiguity to be ambiguous just means to be unclear ambiguity to be unclear about who that's actually referring back to. So ask yourself, we have to pronounce in the sentence. After they gained independence from the Turks, they begin to demand the sculptures and carvings fax from the British. Who is they? Has the sentence or the nearby information done anything to clarify that for us? No, because this is a topic sentence of a new paragraph that's pretty dangerous.

The if they were to define who that person or people were, was or were previously, It's too far away for us to remember that. So we have an ambiguous pronoun here so we can get rid of answer to a say. And we can also get rid of D because that's still not doing anything to clarify for us. So now we need to just go back and track who who gained independence from the Turks, honestly, from context. I bet it wasn't the Turks who gained independence from the Turks so we can get rid of B and just go with the Greeks.

That not only brings clarity to the sentence about who's doing what, Um, it's makes sense. Not church to Turks but Greeks to Turks, and there we are..

You want a subtract sits one is there he is. Three minutes. 503 minus two is one for minus three is one in one minutes. One is here, so our answers that.

You have the number 58 in which we need to do subtraction. This is 69,000 403 minus 4635. Little straight vertical form 69,400 three minus 4000 600 and 25. No fight cannot be directly subjected from three as three years a smaller than five. So we should borrow one from zero, but zero doesn't have anything to give.

So we need first to give first to make one as 10 by boring one from four. So this will become three. This will become 10. Now, we should borrow one. Um, I'm in 10 from here.

So this would become nine. This would become 13 now. 30 minutes five, eight, 1993 is six and 13. Year three again send the same problem. Six cannot be subjected from three.

So we should borrow here and right. 13 13 minus six is seven and eight. Minus four is 46 So our answer will be 64,768. Thank you. So.

Okay when I start up with my first cold Roddick. 30 s word. Close. 38. A minus 20 1st thing I'm gonna do is take out my court, My G c f.

So in that case, I would have to. When I divide, he's turned by two unlocked with 15 a square. Plus 19 eh? Minus 10. I like to encourage my students to go ahead and write that to down where you're gonna put your answer, cause that DCF just disappears this point forward, we're gonna go ahead and find the term that's gonna replace or 19 eh? So I've got negative 1 50 and then about this 19 on the bottom. So to get this, I'm gonna do How about 25 6? Where six has to be negative.

25 times negative. Six gives me negative 150. 25 minus six. Gives me 19. So I got 15.

A square was 25 a minus six. A minus 10. At this point, I can go ahead and group them into twos and start taking out the G c A. My first to have five A in common. If I divide by five A.

That would leave me with three a plus fly my last to be real careful when you take that negative. So I got negative too. Six a divided by that negative to say about it by negative two is gonna be three A and the negative tend about about negative to its plus. So this is gonna be one of my factors. The three a plus five by other factor will be the two terms on the outside.

We're gonna combine them. And that's my other factors. So I got two times three a plus, five times five a minus two equals 30 a squared plus 38 plus negative for me..