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3 years ago

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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Please help need answer fast will give brainliest

Maslowich

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B) (1,5) (3, 3)

C) inconsistent because it starts to go down.

D) (0,3) (1, 5) (2,7) (3,3)

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3 years ago

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dalvyx [7]

Answer:

$- \frac{1}{5 \sqrt{y} }$

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Ilya [14]

The correct answer will be B

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3 years ago

Show me how to get this answer show your work

Rama09 [41]

We know that angle MKJ is comprised of angle MKL and angle LKJ. That means if we add MKL and LKJ, we should get 80 degrees, which is the measure of angle MKJ.

$MKL + LKJ= MKJ \implies \\ 2x+10+3x-5=80 \implies \\ 5x+5=80 \implies\\ 5x=75 \implies \\ x=15$

So, we know that our x is 15. That is not enough to tell whether KL is an angle bisector, because we have to evaluate both MKL and LKJ with x=15, so:

$MKL=2(15)+10 = 40\\ LKJ=3*15-5=40$

So we see that these two angles are actually bisectors, and the third question best describes this phenomenon.

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3 years ago

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The sum of a number and its additive inverse is

BlackZzzverrR [31]

Answer:

1+1=2 additive inverse 1/2

Step-by-step explanation:

hope it helps

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3 years ago