Question

If x=10.0+-0.1 and y=10.0+-0.1, then 2x-2y is equal to

Answer 1

Apply formula

(A±ΔA)−(B±ΔB)=(A−B)±(ΔA−ΔB)

Similarly

  2x−2y=2(10.0±0.1)−2(10±0.1)

 =(2×10−2×10)±(2×0.1−2×0.1)

 =0

Hence, 2x−2y=ZERO 

Answer 2

Answer:

2×9.9-2×9.9=0

Explanation:

here gave x=10.0+(-0.1)=10.-0.1=9.9

you=10.0+(-0.1)=10-0.1=9.9

I should substitute in x and y value in the given equation. so finally I will get zero answer