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Oxana [17]
3 years ago
10

Add.910+(−45).Write your answer as a fraction in simplest form

Mathematics
1 answer:
gavmur [86]3 years ago
3 0
-44.09 i dont understand why we must have 20 characters but OK
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Solve this equation for x. <br> 2/3(x+8)^2-66=0
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Answer:

\large\boxed{x=-8\pm3\sqrt{11}}

Step-by-step explanation:

\dfrac{2}{3}(x+8)^2-66=0\qquad\text{add 66 to both isdes}\\\\\dfrac{2}{3}(x+8)^2-66+66=0+66\\\\\dfrac{2}{3}(x+8)^2=66\qquad\text{multiply both sides by 3}\\\\3\!\!\!\!\diagup^1\cdot\dfrac{2}{3\!\!\!\!\diagup_1}(x+8)^2=(3)(66)\\\\2(x+8)^2=198\qquad\text{divide both sides by 2}\\\\\dfrac{2\!\!\!\!\diagup^1(x+8)^2}{2\!\!\!\!\diagup_1}=\dfrac{198\!\!\!\!\!\diagup^{99}}{2\!\!\!\!\diagup_1}\\\\(x+8)^2=99\iff x+8=\pm\sqrt{99}\qquad\text{subtract 8 from both sides}

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4 years ago
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