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alexandr1967 [171]
2 years ago
8

-7^-2does anyone know ?

Mathematics
2 answers:
Leno4ka [110]2 years ago
8 0

Negative exponents mean that you flip the number upside down

so -7^-2 would become 1/-7^2

-7^2 would be 49

so the answer is <em>1/49</em>

Lelu [443]2 years ago
5 0
That simply means this:

- \frac{1}{ {7}^{2} }

Which is:

- \frac{1}{49}
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∴ x' = x/√2 - y/√2 = (x - y)/√2

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* Lets substitute x' and y' in the 1st answer

∵ (x')² - (y')² - 16 = 0

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* Lets open the bracket

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* Lets add the like terms

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* Divide the equation by -2

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∴ Answer (a) is our answer

∴ The answer is hyperbola; (x')² - (y')² - 16 = 0

* Look at the graph:

- The black is the equation (x')² - (y')² - 16 = 0

- The purple is the equation xy = -8

- The red line is x'

- The blue line is y'

6 0
3 years ago
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