Twice the square of a positive integer is 12 more than 5 times that integer What is the integer ........

Quantitative Aptitude ( CCS) Number System

Twice the square of a positive integer is 12 more than 5 times that integer. What is the integer?

Can’t determined

2x²- 5x = 12 (Since, the difference between twice the square of given number and five times the same number is 12)

now

2x² - 5x -12 =0

Factorizing the given equation

we get

(x-4) (2x+3) =0

x= 4 or x=-2/3 (since the question says it is a positive integer, the value is 4)

Therefore the given integer is 4.

Hence, option 3 is the correct answer.

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what is the difference between ans 4 of option a and option c

What is the difference between option a and c?