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NISA [10]
3 years ago
10

3x with a 2 as an exponent +8x=35

Mathematics
2 answers:
Alex3 years ago
8 0

Answer:

The roots are {-5, 7/3}.

Step-by-step explanation:

I am assuming you want to solve this for x.

3x^2 + 8x = 35

3x^2 + 8x - 35 = 0        Try factoring by the 'ac' method.

ac = 3 * -35 = - 105.

We need 2 numbers whose product is -105 and whose sum = + 8.

These are  +15 and  - 7, so we write:

3x^2 + 15x - 7x - 35 = 0      Now factor by grouping:

3x(x + 5) -7(x + 5) = 0          (x + 5) is common so:

(3x - 7)(x + 5) = 0

The roots are {-5, 7/3}.

masha68 [24]3 years ago
8 0
It is (-5)(7/3) that’s the answer
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Step-by-step explanation:

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6 0
2 years ago
The sum of x and it’s opposite is always zero?
jeka94

Answer:

1) Let's consider the first case with the number 0 the oppose is also 0 and we have that 0-0=0 so then applies

2) Now let's consider any real number a no matter positive or negative we will have that:

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So then we can conclude that the expression is a general rule and is true

Step-by-step explanation:

For this case we can verify if the following expression is true or false:

The sum of x and it’s opposite is always zero?

If we want to proof this we need to show that for any number is true.

1) Let's consider the first case with the number 0 the oppose is also 0 and we have that 0-0=0 so then applies

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Or in the other case:

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5 0
3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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