2 years ago

Which is the first question in brainly

Mathematics

1 answer:

Vedmedyk [2.9K]2 years ago

3 0

Answer:

this question

Step-by-step explanation:

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DaniilM [7]

Answer:

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Step-by-step explanation:

Poorly formatted question.

The given equation is:

$y = -x^2 + 10x - 8$

Required

The point where the trestle gets to the ground level

To do this, we set $y = 0$

So, we have:

$-x^2 + 10x - 8 = 0$

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$x^2 -10x + 8 = 0$

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$x= \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

Where:

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So, we have:

$x= \frac{-(-10) \± \sqrt{(-10)^2 - 4*1*8}}{2*1}$

$x= \frac{-(-10) \± \sqrt{68}}{2*1}$

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$x= \frac{10 \± 8.25}{2}$

Solve the fraction

$x= 5 \± 4.125$

Split

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