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konstantin123 [22]
3 years ago
10

Solving equations (algebra). Thank you!

Mathematics
1 answer:
LenKa [72]3 years ago
5 0

Answer:

\large\boxed{\dfrac{1}{x^2}+x^2=23}

Step-by-step explanation:

\left(\dfrac{1}{x}+x\right)^2=25\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\\left(\dfrac{1}{x}\right)^2+2(x\!\!\!\!\diagup)\left(\dfrac{1}{x\!\!\!\!\diagup}\right)+x^2=25\\\\\dfrac{1}{x^2}+2+x^2=25\qquad\text{subtract 2 from both sides}\\\\\dfrac{1}{x^2}+x^2=23

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