menu
Qammunity.org
Login
Register
My account
Edit my Profile
Private messages
My favorites
Solve by transforming into a perfect square trinomial x squared-14x=15
Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question
Solve by transforming into a perfect square trinomial x squared-14x=15
asked
Feb 16, 2018
130k
views
0
votes
Solve by transforming into a perfect square trinomial
x squared-14x=15
Mathematics
high-school
Nathifa
asked
by
Nathifa
7.9k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
1
vote
x^2 - 14 x = 15
(x - 7)^2 - 49 = 15
(x-7)^2 = 64
x - 7 = - or + 8
x = 15 or -1
Just take half o the coefficient of x and subtract it squared as above.
In general
x^2 + ax = b
(x + a/2)^2 - a^2/4 = b
Ckluss
answered
Feb 23, 2018
by
Ckluss
8.3k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
May 2, 2018
115k
views
Solve the following equation by transforming it into a perfect square trinomial. x² – 14x = 15 {–22, 36} {57, 71} {–1, 15} {–15, 29}
Nenchev
asked
May 2, 2018
by
Nenchev
8.1k
points
Mathematics
high-school
1
answer
4
votes
115k
views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
9.4m
questions
12.2m
answers
Other Questions
How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement how thick must the cement be to cover field
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qammunity.org