First step is to find out the two numbers when multiplied results to 36 & when subtracted results to 5. Um..Let's think for a lil bit.....Yeah! you got it :) The numbers are 9 and 4!
---- x²+ ( 9 - 4)x - 36
Distribute x :
---- x² + 9x - 4x - 36
Take the common :
---- x ( x + 9 ) - 4 (x + 9 )
---- ( x - 4 ) ( x + 9 )
Yayyy! We got our answer :) The right answer is of Option C [ ( x - 4 ) ( x + 9 ) ]
