Question

 The value of 5 x² when x = 3 is ___ *

15

25

50

45

​

Answer 1

Answer:

x=3+22   x1=3+221×3−223−22

=3−22

(x−21)2=x+x1−2

=3+22+3−22−2=4

So, x−x1=4=±12 Ans 

Answer 2

Answer:

hope it will help you

answer is 45