Question

Solve. 2x2 + x = 15.

Answer 1

I'm assuming that means \[2x ^{2} + x = 15\]?

Answer 2

yes

Answer 3

2x2 + x = 15
2x2 + x -15 =0
(2x-5)(x+3)=0
x= 5/2 OR x=-3

Answer 4

okay, you'll need to use the quadratic formula:
\[ \frac{-b \pm \sqrt{b ^{2}} - 4ac}{2a}\]

Answer 5

\[2x^2+x-15=0\]
\[(2x-5)(x+3)=0\]
x=2,5 or -3

Answer 6

@sfozturk61 2&5 are not solutions
5/2 & -3 are the only solutions **

Answer 7

Rewrite as 2x^2 +6x - 5x -15. Now factor by grouping 2x(x +3) - 5(x + 3). Factors to
(2x- 5)(x+3)= 0 x=5/2 and -3

Answer 8

@hoblos I mean 2,5 so 2 and one half = 5/2