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Leno4ka [110]
3 years ago
8

Solve the equation by using square roots. 2 x 2 − 9 = 11

Mathematics
1 answer:
VashaNatasha [74]3 years ago
3 0

Answer:

x = ± \sqrt{10}

Step-by-step explanation:

Given

2x² - 9 = 11 ( add 9 to both sides )

2x² = 20 ( divide both sides by 2 )

x² = 10 ( take the square root of both sides )

x = ± \sqrt{10} ← exact solutions

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olga55 [171]

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So we start by combining like terms;
- 6h + h =  - 5h
4 - 3 = 1
Now we have;
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We then subtract 1 from both sides;
- 5h + 1 = 11
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Then we divide both sides by 5;
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- 5h \div  - 5h =  h
10 \div  - 5h =  - 2
Leaving the final answer to be h = -2
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4 years ago
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Answer:

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Answer:

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Note:

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Answer:

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Step-by-step explanation:

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