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Arada [10]
3 years ago
7

How many real roots does the function

Mathematics
1 answer:
icang [17]3 years ago
6 0

Answer:

Option C is correct i.e. 2.

Step-by-step explanation:

Given the function is f(x) = x² +8x -2.

We can compare it with general quadratic expression i.e. ax² +bx +c.

Then a = 1, b = 8, c = -2.

We can find the number of real root by finding discriminant of the equation ax² +bx +c =0 as follows:-

D = b² -4ac

D = 8² -4*1*-2

D = 64 +8

D = 72.

When D is a positive value, then we have two real roots of the equation.

Hence, option C is correct i.e. 2.

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Answer:

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Step-by-step explanation:

7 0
3 years ago
Which expression is represented by the diagram?<br> o -6-(-1)<br> o -6-1<br> o -5-(-1)<br> o -5-1
cupoosta [38]

Option A:

–6 – (–1)

Solution:

Minus symbol are given in the diagram.

There are 6 minus symbol in the diagram.

From that expression 1 minus symbol is cancelled.

<em><u>To find which expression represents this situation:</u></em>

Option A: –6 – (–1)

Total number of minus = –6

From this cancel one minus: –6 – (–1)

–6 – (–1) = –6 + 1 = –5

So, remaining minus are –5.

This is the correct answer.

Option B: –6 –1

–6 –1 = –7

But note that remaining 5 minus are only there in the diagram.

So, this is not correct answer.

Option C: –5 – (–1)

Totally 6 minus in the problem. But here only 5 minus are given.

So, this is not correct answer.

Option D: –5 –1

Totally 6 minus in the problem. But here only 5 minus are given.

So, this is not correct answer.

Hence –6 – (–1) is the correct expression which represented the diagram.

8 0
3 years ago
Read 2 more answers
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MAVERICK [17]
X^3 - 2x - 10 - 36/x-5
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Answer:

x = -10

y = -13

Step-by-step explanation:

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-6y - 18 + 4y = 8

-2y - 18 = 8

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y = -13

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3 years ago
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Solve for s. write answers as integers or as proper or improper fractions in simplest form.
Rudik [331]

Answer:

+10 or -10

Step-by-step explanation:

square root both sides

8 0
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