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KonstantinChe [14]
4 years ago
7

Y=x^2-2x-1 and y=-3x+5 solved algebraically

Mathematics
1 answer:
eduard4 years ago
3 0

Answer:

Step-by-step explanation:

y=x²-2x-1

and y=-3x+5

x²-2x-1=-3x+5

x²+x-6=0

x²+3x-2x-6=0

x(x+3)-2(x+3)=0

(x+3)(x-2)=0

x=-3,2

when x=-3

y=-3×-3+5=9+5=14

when x=2

y=-3×2+5=-6+5=-1

so solutions are (-3,14) and (2,-1)

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The model of a trinomial is shown.
galben [10]

The factors of the trinomial based on the information given include:

C. x – 7

E. x + 2

<h3>What is a trinomial?</h3>

It should be noted that a trinomial is an algebraic expression that has three non-zero terms. Here, the examples of a trinomial expression: x + y + z is a trinomial in three variables x, y and z. Also, 2a² + 5a + 7 is a trinomial in one variables.

In this case, the algebra tile configuration has 0 tiles are in the Factor 1 spot and 0 tiles are in the Factor 2 spot. 24 tiles are in the Product spot: 1 is labeled + x squared, 7 are labeled negative x. Here, the trinomial is x² - 5x - 14.

The factors will be:

x² - 5x - 14.

x² + 2x - 7x - 14

x(x + 2) - 7(x + 2)

= (x + 2)(x - 7)

A polynomial with three terms is called a trinomial.

In conclusion, the correct options are C and E.

Learn more about trinomial on:

brainly.com/question/11929575

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6 0
2 years ago
Help me! Read the question carefully
prohojiy [21]

Answer:

21mm

Step-by-step explanation:

The formula for solving the area of a rhombus is : \frac{1}{2}xy, where x and y are two intersecting diagonals.

In this case, we are given both values, thankfully. 6 and 7 are to be replaced with x & y. Now, the rest you have to do is simple math.

(6 * 7) / 2 = 21

The area of the rhombus is 21mm.

5 0
3 years ago
A rectangle is 3 1/2 inches by 2 1/4
Alchen [17]

Answer:

Are you talking about adding? If you are, the answer is 5 3/4. But if you're talking about subtracting, the answer is 1 1/4.

8 0
4 years ago
Carlos found that the length of the diagonal of his laptop monitor is StartRoot 290 EndRoot. If the manufacturer rounds to the n
frosja888 [35]

Answer:

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Step-by-step explanation:

mathematics help

7 0
3 years ago
-9+5y= -4x<br> -11x= -20+9y
Jlenok [28]

Answer:

-9+5y=-4x

-20+9y=-11x

-4x

+ -11x

_____

-15x

Step-by-step explanation:

i dont really know what i did i kinda just guessed because im not that smart

6 0
3 years ago
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