What's the answer to 9-2x=35 using distributive property? Pls HELP!

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

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