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Zepler [3.9K]
2 years ago
10

How would you find the solutions to this quadratic equation y=2x^2-6x-8

Mathematics
2 answers:
aleksandrvk [35]2 years ago
8 0

Answer:

Factoring.

General Formulas and Concepts:

<u>Algebra I</u>

  • Factoring
  • Finding roots of quadratics

Step-by-step explanation:

<u>Step 1: Define</u>

y = 2x² - 6x - 8

0 = 2x² - 6x - 8

<u>Step 2: Find roots</u>

  1. Factor 2:                    0 = 2(x² - 3x - 4)
  2. Factor:                        0 = 2(x - 4)(x + 1)
  3. Find roots:                 x = -1, 4

And we have our final answer!

Marysya12 [62]2 years ago
7 0

Answer:

first take 2 out of the equation

y=2(x^2-3x-4)

then factor

y=2(x-4)(x+1)

then solve

(x-4)=0 .  (x+1)=0

x=4 .          x=-1

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2 years ago
Identify each function that has a remainder of -3 when divided x+6
Sergeu [11.5K]

Answer:

D

Step-by-step explanation:

According to remainder theorem, you can know the remainder of these polynomials if you plug in x = -6 into them.

<em>So we will plug in -6 into x of all the polynomials ( A through D) and see which one equals -3.</em>

<em />

<em>For A:</em>

x^5 + 2x^2 - 30x + 30\\=(-6)^5 + 2(-6)^2 - 30(-6) + 30\\=-7494

For B:

x^4 + 4x^3 - 21x^2 - 53x + 12\\=(-6)^4 + 4(-6)^3 - 21(-6)^2 - 53(-6) + 12\\=6

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5 0
2 years ago
Worth 2 marks and I need it urgently pls
melisa1 [442]
4c6d3 x 3c4d

4 x 3=12
12c
you add the powers so 6+4=10
12c10
d3 x d=d3
12c10d3


that is the answer i think

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2 years ago
Freddy is buying wings and nachos for a party. a box of ten wings cost $7.00 Nachos cost $4.00 per tray. He must spend less than
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Hey there! The answer is 7x + 4y < 40

Let's first rearrange our data in a more structured way.

x represents a box of wings which has a cost of $7.00. Therefore the total cost of the boxes is 7x.

y represents a tray of nachos which has a cost of $4.00. Therefore the total cost of the trays is 4y.

The sum of the costs of trays and boxes, which is (7x + 4y) must be smaller than $40.

Now we can set up the inequality.
7x + 4y < 40

~ Hope this helps you!
6 0
2 years ago
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