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Sladkaya [172]
3 years ago
7

How do i solve the equation

"TexFormula1" title="4x {}^{2} + 40x + 84 = 0" alt="4x {}^{2} + 40x + 84 = 0" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
SpyIntel [72]3 years ago
6 0
QUADRATIC \: \: RESOLUTIONS \\ \\ \\\\4 {x}^{2} \: + \: 40x \: + \: 84 \: = \: 0 \\ \\ 4 \: ( \: {x}^{2} + 10x + 21) \: = \: 0 \\ \\ 4 \: can \: never \: be \: equal \: to \: \: 0 \\ \\ {x}^{2} \: + \: 10x \: + \: 21 = \: 0 \\ \\ {x}^{2} + \: 7x \: + 3x \: + \: 21 = 0 \\ \\ x(x + 7) + 3(x + 7) = 0 \\ \\ ( \: x + 7 \: ) \: ( \: x + 3 \: ) \: = \: 0 \\ \\ On \: solving \: \: , \: \: \:  We \: get \: \: \: \: \: - \\ \\ \\ x \: = \: - 7 \: \: \: or \: \: \: x = \: - 3 \: \: \: \: \: \: \: \: Ans.
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For any real number x,x2>x3
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8 0
3 years ago
What number is 76.8% of 42.5
Law Incorporation [45]
To get the solution, we are looking for, we need to point out what we know. 

<span>1. We assume, that the number 42.5 is 100% - because it's the output value of the task. </span>
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 42.5 is 100%, so we can write it down as 42.5=100%. </span>
<span>4. We know, that x is 76.8% of the output value, so we can write it down as x=76.8%. </span>
5. Now we have two simple equations:
1) 42.5=100%
2) x=76.8%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
42.5/x=100%/76.8%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 76.8% of 42.5

42.5/x=100/76.8
<span>(42.5/x)*x=(100/76.8)*x       - </span>we multiply both sides of the equation by x
<span>42.5=1.30208333333*x       - </span>we divide both sides of the equation by (1.30208333333) to get x
<span>42.5/1.30208333333=x </span>
<span>32.64=x </span>
x=32.64

<span>now we have: </span>
<span>76.8% of 42.5=32.64</span>
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4 years ago
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Step-by-step explanation:

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Answer:

Step-by-step explanation:

Umm well  mean you just have to use like terms. start by doing any math until there are no parenthesis, and then you basically just use like terms to solve it.  (like if you have (a^{2} b)(ab) then you use like terms) I would need specifics to be able to evaluate more, but I hope this helps!

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Suppose that the domain of the propositional function P(x) consists of –5, –3, –1, 1, 3, and 5. Express ∀x((x ≠ 1) → P(x)) witho
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Answer:

The Answer and explanation with steps in the following attachment

Step-by-step explanation:

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