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densk [106]
4 years ago
7

Solve using quadratic equations

Mathematics
1 answer:
olasank [31]4 years ago
7 0
4x² - 9x² + 5 = 0
4x² - 4x - 5x + 5 = 0
4x(x - 1) - 5(x - 1) = 0
(4x - 5)(x - 1) = 0

Set each binomial equal to zero. 

4x - 5 = 0
4x = 0 + 5
4x = 5
x = 5/4

x - 1 = 0
x = 0 + 1
x = 1

Your solutions are x = 1, 5/4
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It will help you.

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SVETLANKA909090 [29]

Based on the calculations, the amount of money she invested is equal to $3,520.

<h3>How to determine the amount invested?</h3>

First of all, we would assign variables to the amount of money that he invested at different interest rates as follows:

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Since Lydia invested the same amount of money in both stocks, we have:

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At the two interest rates, the total amount Lydia gets is given by:

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Read more on interest rates here: brainly.com/question/16793428

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