Register
How do i solve 2x^2+5x+2=9
77.7k views
0 votes
How do i solve 2x^2+5x+2=9

User Usman Sabuwala
by
7.7k points

2 Answers

5 votes

2x^2+5x+2=9\\ 2x^2+5x-7=0\\ 2x^2-2x+7x-7=0\\ 2x(x-1)+7(x-1)=0\\ (2x+7)(x-1)=0\\ x=-(7)/(2) \vee x=1
User Benjumanji
by
8.5k points
5 votes
2x² + 5x + 2 = 9
2x² + 5x + 2 - 9 = 9 - 9
2x² + 5x - 7 = 0
x = -5 +/- √(5² - 4(2)(-7))
2(2)
x = -5 +/- √(25 + 56)
4
x = -5 +/- √(81)
 4
x = -5 +/- 9
 4
x = -5 + 9 x = -5 - 9
4 4
x = 4 x = -14
4 4
x = 1 x = -3.5
User Bearcat
by
8.0k points
← Prev Question Next Question →

No related questions found

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
Write words to match the expression. 24- ( 6+3)
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
The cost of 5 similar digital cameras and 3 similar video cameras is 3213. Each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he
Link Copied!