Register
The square of a certain number is 4 less than 4 times that same number. What is the value of the number? Select one: A. -2 B. -1 C. 0 D. 2
202k views
1 vote
The square of a certain number is 4 less than 4 times that same number. What is the value of the number?

Select one:
A. -2
B. -1
C. 0
D. 2

User Wakachamo
by
3.5k points

1 Answer

5 votes
x^2 = 4x - 4
turn it into a quadratic by bringing the right to the left
x^2 - 4x + 4 = 0
factorise the quadratic
( x - 2 )^2 = 0
x - 2 = 0
x = 2
User Oleg Barabanov
by
4.9k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.5m questions

5.9m answers

Other Questions

Before beginning voice lessons, Aubrey already knew how to sing 357 pieces, and she expects to learn 2 new pieces during each week of lessons. After 78 weeks of voice lessons, how many pieces will Aubrey
A study was completed in Florida. In southern Florida, the study involved 3,000 patients; 54% of them experienced flulike symptoms during the same month. The study had a margin of error of 1.8%. What does
3x-by=-3 b=? what is the number of b? ​
Solve for x in the equation 3 x squared minus 18 x + 5 = 47. (I need this to be an answer like X=3+\_ square root 23)
Can someone help me plz I have to Turn 27/9 in simplest
Link Copied!