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anonymous
 4 years ago
Solve. 2x2 + x = 15.
anonymous
 4 years ago
Solve. 2x2 + x = 15.

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MSMR
 4 years ago
Best ResponseYou've already chosen the best response.2I'm assuming that means \[2x ^{2} + x = 15\]?

hoblos
 4 years ago
Best ResponseYou've already chosen the best response.12x2 + x = 15 2x2 + x 15 =0 (2x5)(x+3)=0 x= 5/2 OR x=3

MSMR
 4 years ago
Best ResponseYou've already chosen the best response.2okay, you'll need to use the quadratic formula: \[ \frac{b \pm \sqrt{b ^{2}}  4ac}{2a}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[2x^2+x15=0\] \[(2x5)(x+3)=0\] x=2,5 or 3

hoblos
 4 years ago
Best ResponseYou've already chosen the best response.1@sfozturk61 2&5 are not solutions 5/2 & 3 are the only solutions **

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Rewrite 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

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@hoblos I mean 2,5 so 2 and one half = 5/2
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