Mathematics
Mathematics, 29.03.2021 22:30, greenbyron88

Need help with a few Algebra problems because I can't really do this atm. Problem 1:
x^2 - 13x - 41 = 4
Step 1: x^2 - 13x - 36 = 0
Step 2: (x-9)(x+4) = 0
Step 3: x - 9 = 0 x + 4 = 0
Step 4: x = 9 x = 4

There is a mistake in there. How should it be fixed?

Problem 2:
x^3 - 16x = 0
Step 1: (x-4)(x+4)
Step 2: x-4 = 0 x+ 4 = 0
Step 3: x = 4 / x = -4

If one of these steps are incorrect, list it and tell me how to fix it.

Problem 3:
2x^2 - 7x 3 = 1
Step 1: 2x^2 - 7x - 4 = 0
Step 2: x^2 - 7x - 4 = 0
Step 3: (x-8)(x+1) = 0
Step 4: (x-\frac{8}{4})(x+\frac{1}{4}) = 0
Step 5: (x-2)(4x+1) = 0
Step 6: x - 2 = 0 4x + 1 = 0
Step 7: x = 2 x = -\frac{1}{4}

One of these steps is incorrect, Tell me how to fix it along which step it is.

Show work for all 3 problems.

answer
Answers: 2

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 16:20, amortegaa805
Which best explains why this triangle is or is not a right triangle?
Answers: 1
image
Mathematics, 21.06.2019 17:20, kelli151
Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x
Answers: 1
image
Mathematics, 21.06.2019 17:30, kruzyoungblood8
When a rectangle is dilated, how do the perimeter and area of the rectangle change?
Answers: 2
image
Mathematics, 21.06.2019 20:30, Gabyngreen
What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81
Answers: 1
Do you know the correct answer?
Need help with a few Algebra problems because I can't really do this atm. Problem 1:
x^2 - 13...

Questions in other subjects:

Konu
Engineering, 04.12.2020 22:40
Konu
Mathematics, 04.12.2020 22:40
Konu
Biology, 04.12.2020 22:40
Konu
Chemistry, 04.12.2020 22:40