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user100 [1]
3 years ago
9

Describe and correct the error in finding the sum of the numbers.

Mathematics
1 answer:
Greeley [361]3 years ago
4 0
The error was when they changed the sets of parenthesis because it changed the problem completely
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HELP ME ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing. Check ALL that apply.
Elena L [17]

Answer:

x = -2 or x = 1/3 thus: B & C

Step-by-step explanation:

Solve for x over the real numbers:

2 x^2 + 7 x - 2 = 2 x - x^2

Subtract 2 x - x^2 from both sides:

3 x^2 + 5 x - 2 = 0

The left hand side factors into a product with two terms:

(x + 2) (3 x - 1) = 0

Split into two equations:

x + 2 = 0 or 3 x - 1 = 0

Subtract 2 from both sides:

x = -2 or 3 x - 1 = 0

Add 1 to both sides:

x = -2 or 3 x = 1

Divide both sides by 3:

Answer: x = -2 or x = 1/3

3 0
3 years ago
For each value of u, determine whether it is a solution to -15 = 1 - 4u
Alona [7]

Answer:

1. No

2. No

3. No

4. Yes

Step-by-step explanation:

Plug each option into u then solve the equation and see if the answer matches -15.

Ex. -15 = 1 -4 (2)

     -15 = 1 -8

     -15 = -7

     -15 does not equal -7 therefore it is false. Use Pemdas to solve.

6 0
3 years ago
Determine whether the polynomial is a difference of squares and if it is, factor it.
Alexandra [31]
Just by the language difference means subtract, 

Y^2-25 is the difference of squares
factored it's the sum and difference of their square roots

(x+5) (x-5)
4 0
3 years ago
What is polynomial?​
shtirl [24]

Answer:

an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s).

5 0
3 years ago
Which of the following solutions solves the system?
gavmur [86]

Answer:

i think its

Step-by-step explanation:

D

5 0
3 years ago
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