please give me an example for the situation for the expression

(7+2)(10-3)

 where brackets are necessary

Hi!

Here is the answer to your question.

 

Consider a rectangle whose length is 10cm and breadth is 7cm. If the length is decreased by 3cm and breadth is increased by 2cm, then what is the area of new rectangle?

Length of new rectangle = 10cm – 3cm = (10 – 3) cm

Breadth of new rectangle = 7cm + 2 cm = (7 + 2) cm

∴Area of new rectangle= (10 – 3) cm × (7 + 2) cm

 

Cheers!