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3 years ago

HELP ME PLSS BRAINIEST

Mathematics

2 answers:

melamori03 [73]3 years ago

6 0

I just need points but u already got ur answer so yeah have a nice day :)

zvonat [6]3 years ago

5 0

(x-7)^2 = 12
Explaination: it’s the answer trust me on this one :D

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Find the discriminant, and determine the number of real solutions. then solve x^2 +8x+20=0

vodomira [7]

Answer:

Part 1) The quadratic equation has zero real solutions

Part 2) The solutions are

$x_1=-4+2i$ and $x_2=-4-2i$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form $ax^{2} +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}+8x+20=0$

$a=1\\b=8\\c=20$

The discriminant is equal to

$D=(b^{2}-4ac)$

If D=0 -----> the quadratic equation has only one real solution

If D>0 -----> the quadratic equation has two real solutions

If D<0 -----> the quadratic equation has two complex solutions

<em>Find the value of D</em>

$D=8^{2}-4(1)(20)=-16$ -----> the quadratic equation has two complex solutions

<em>Find out the solutions</em>

substitute the values of a,b and c in the formula

$x=\frac{-8(+/-)\sqrt{8^{2}-4(1)(20)}} {2(1)}$

$x=\frac{-8(+/-)\sqrt{-16}} {2}$

Remember that

$i=\sqrt{-1}$

$x=\frac{-8(+/-)4i} {2}$

$x_1=\frac{-8(+)4i} {2}=-4+2i$

$x_2=\frac{-8(-)4i} {2}=-4-2i$

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3 years ago

432 + 26 × 10 (Use PEMDAS and show steps to how you got the answer) Plsss help me somebody :)

Svet_ta [14]

4490 just use a calculator

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2 years ago

Read 2 more answers

Henry flies from Washington, DC, to Boston, MA. The first flight from Washington, DC, to New York City is one hour 12 minutes. T

Sunny_sXe [5.5K]

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3 years ago

You bought the new PS5 and 4 games for $660. the PS5 cost $499 and each game cost the same amount. Write an equation that can be

nirvana33 [79]

4x+499=660
X=40.25
X equeals the amount for each game.

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2 years ago

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erik [133]

Answer:

blue marbles - 2/9. red marbles - 3/9 = 1/3 clear marbles - 4/9. Davis got a 2/9 chance and Tessa got a 2/8 or 1/4 chance. I don't know about the last question. it might be 5/9 but I don't know sorry.

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2 years ago