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Norma-Jean [14]
2 years ago
8

What are the solution(s) of x^2-4=20?

Mathematics
1 answer:
Pie2 years ago
4 0

x^2-4=20\qquad|+4\\\\x^2=24\to x=\pm\sqrt{24}\\\\x=-\sqrt{4\cdot6}\ \vee\ x=\sqrt{4\cdot6}\\\\x=-2\sqrt6\ \vee\ x=2\sqrt6

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What is one of the solutions to the following equations? y2+x2=53<br> Y-x=5
Olenka [21]
(1)  y² + x² = 53
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subtitute (2) to (1)

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x² + 2x·5 + 5² + x² = 53

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2x² + 10x - 28 =0     |divide both sides by 2

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