Question

factorise by splitting the middle term 4x²-17-21​

Answer 1

solution :-

=> 4x²-17-21

=> 4x² - 38

=> 2( x² - 19)

=> 2 = 0 or x² - 19 = 0

=> 2 ≠ 0 or x² = 19

hence,

=> x = √19

i hope it helps you....