Algebra problem

Algebra Level 3

Find the sum of the coefficients of x x on the factors of the equation, 2 x 2 + 5 x − 12 = 0 2x^2+5x-12=0 .


The answer is 3.

Conan Edogawa by Conan Edogawa , 24, Philippines

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2 solutions

Rifath Rahman
Aug 22, 2014

The trick is x+4,where x"s coefficient is 1

1 Helpful 0 Interesting 0 Brilliant 0 Confused

I thought you have to solve for x independently.

William Isoroku - 6 years, 9 months ago
Conan Edogawa
Aug 3, 2014

The factors of 2 x 2 + 5 x − 12 2x^2+5x-12 is 2 x − 3 2x-3 and x + 4 x+4 which makes 2 2 and 1 1 as coefficients, respectively. 2 + 1 = 3 2+1=\boxed 3

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Exactly!:D

Anik Mandal - 6 years, 10 months ago

simple as it is.

pulkit gopalani - 6 years, 10 months ago

Good ,I did miss 1 from x-+4, thanks

K.K.GARG,India

Krishna Garg - 6 years, 10 months ago

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