While finding the value of an algebraic expression 5x when x = – 2,

1.	While finding the value of an algebraic expression 5x when x = – 2, two students solved as follows:Can you guess who has done it correctly? Justify!
Answer» Given expression is 5x when x = – 2 5x = 5(- 2) = – 10 Chaitanya is correct. Here we have to multiply 5 and,- 2. But Reeta subtracted. So, Reeta is wrong.

While finding the value of an algebraic expression 5x when x = – 2, two students solved as follows:Can you guess who has done it correctly? Justify!

Answer»

Given expression is 5x when x = – 2

5x = 5(- 2) = – 10

Chaitanya is correct.

Here we have to multiply 5 and,- 2.

But Reeta subtracted.

So, Reeta is wrong.