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3. ![frac{ x^{2} }{x+10} - frac{100}{x+10} = frac{ x^{2} -100}{x+10} = frac{(x-10)(x+10)}{x+10} = x-10 = 10.27-10 = 0.27 frac{ x^{2} }{x+10} - frac{100}{x+10} = frac{ x^{2} -100}{x+10} = frac{(x-10)(x+10)}{x+10} = x-10 = 10.27-10 = 0.27](https://tex.z-dn.net/?f=+frac%7B+x%5E%7B2%7D+%7D%7Bx%2B10%7D+-++frac%7B100%7D%7Bx%2B10%7D+%3D++frac%7B+x%5E%7B2%7D+-100%7D%7Bx%2B10%7D++%3D++frac%7B%28x-10%29%28x%2B10%29%7D%7Bx%2B10%7D+%3D+x-10+%3D+10.27-10+%3D+0.27)
4.![frac{4}{a-1} + frac{3}{a} = frac{4a+3(a-1)}{a(a-1)} = frac{4a+3a-3}{a(a-1)} = frac{7a-3}{ a^{2}-a } frac{4}{a-1} + frac{3}{a} = frac{4a+3(a-1)}{a(a-1)} = frac{4a+3a-3}{a(a-1)} = frac{7a-3}{ a^{2}-a }](https://tex.z-dn.net/?f=+frac%7B4%7D%7Ba-1%7D+%2B++frac%7B3%7D%7Ba%7D++%3D++frac%7B4a%2B3%28a-1%29%7D%7Ba%28a-1%29%7D+%3D++frac%7B4a%2B3a-3%7D%7Ba%28a-1%29%7D+%3D++frac%7B7a-3%7D%7B++a%5E%7B2%7D-a+%7D+)
4.
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