Answer: Option 'D' is correct.
Step-by-step explanation:
When a rational number is multiplied by rational number , it gives rational number only.
When an irrational number is multiplied by rational number, it gives irrational number always.
Since we need to produce an irrational number .
A. 3/4 is a rational number if we multiply by -1.25 it will remain a rational number.
B.[tex] 5.21=\dfrac{521}{100}[/tex] is a rational number if we multiply by -1.25 it will still remain a rational number.
C.[tex]-0.454545=-0.\bar{45}=\dfrac{-45}{99}[/tex] is a rational number if we multiply by -1.25 it will still remain a rational number.
D. square root 17 = √17 is an irrational number if we multiply by -1.25 , it still remain irrational number.
So, Option 'D' is correct.
