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irakobra [83]
3 years ago
13

Solve 8x2 + 6x + 5 = 0

Mathematics
1 answer:
MariettaO [177]3 years ago
5 0
8 x 2 + 6x + 5=0
16 + 6x + 5=0
6x+21=0
6x+21-21=0-21
6x=-21
6x/6=-21/6
x=-7/2
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4x = 2x + 6<br> What’s the solution?
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Answer:

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Explanation:

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Plot the points (2,0) and (2,-5) on the coordinate plane below.
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Answer:

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Step-by-step explanation:

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Complete the square x^2-10=16<br><br>​
Hatshy [7]

Answer:

(x - 5)² = 41

Step-by-step explanation:

* Lets revise the completing square form

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# The completing square is x² ± bx + c = (x ± h)²

# Remember c must be positive because it is = h²

* Lets use this form to solve the problem

∵ x² - 10x = 16

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∵ 2h = -10 ⇒ divide both sides by 2

∴ h = -5

∴ h² = (-5)² = 25

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∴ c = 25

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- We will add 25 and subtract 25 to the equation to make the

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∴ x² - 10x + 25 - 25 = 16

∴ (x² - 10x + 25) - 25 = 16 ⇒ add 25 to both sides

∴ (x² - 10x + 25) = 41

* Use the rule of the completing square above

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∴ (x - 5)² = 41

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Camille shaded _1 8
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Answer:

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Step-by-step explanation:

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