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True [87]
2 years ago
12

Use the quadratic formula to solve the quadratic equation x2 − 8x − 4 = 0.

Mathematics
1 answer:
mixas84 [53]2 years ago
4 0
Hello here is a solution :
<span>x² − 8x − 4 = 0.
</span><span>quadratic equation   ax²+bx+c = 0  when :  a=1 and b= -8 and c = -4
discriminant : d = b²-4ac       d= (-8)²-4(1)(-4) =64+16 =70
x= (-b-rot(d))/2a          </span>x'= (-b+rot(d))/2a    .......conrinu
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The excluded values of a rational expression are 2 and 5. Which of the following could be this expression?
LuckyWell [14K]

Answer:

You have not added the options, therefore, I cannot provide an exact answer. However, I can help you with the concept.

In any fraction, the denominator cannot be equal to zero because this would make the fraction undefined.

Excluded values are the values that would make the denominator equal to zero.

We are given that the excluded values are 2 and 5, this means that the factors of the denominator are (x-2) and (x-5)

This means that the denominator is x² - 7x + 10

Pick the fraction which has this denominator.

Hope this helps :)

3 0
3 years ago
I REALLY NEED HELP LIKE ASAP
Akimi4 [234]

1. The square on the inside is 8 x 8 = 64

2. The triangle's area is 8x9x1/2= 72 x 1/2 = 36

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7 0
2 years ago
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Simplify each expression then factor the expression 14-28t-5(7+10t)
ludmilkaskok [199]

Answer:

Simplified: -21-98t

Factored: -7(14t+3)

Step-by-step explanation:

The given expresion is:

14-28t-5(7+10t)

We expand the parenthesis to get:

14 - 28t -35 - 70t

We group like terms to get:

14 -35  - 28t- 70t

We combine similar terms to get:

- 21- 98t

We now factor to obtain:

- 21- 98t =  - 7(14t + 3)

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3 years ago
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