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tamaranim1 [39]
4 years ago
12

3x^2+x^2=20 (3x squared+ x squared = 20)

Mathematics
2 answers:
liq [111]4 years ago
7 0

Answer:

Step-by-step explanation:

hello :

Question

3x²+x²=20

4x² = 20

x² =5

x=  √5 or x=  - √5

marin [14]4 years ago
3 0

Answer:

x = ± \sqrt{5}

Step-by-step explanation:

Given

3x² + x² = 20, that is

4x² = 20 ( divide both sides by 4 )

x² = 5 ( take the square root of both sides )

x = ± \sqrt{5}

That is x = - \sqrt{5} or x = \sqrt{5} ← exact solutions

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nydimaria [60]

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insert x = -2

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option D. 3/4 will be the correct answer.

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Answer:

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4 years ago
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