Question

Subtract : 5a2 - 2a from 7a2

+ 5a + 6.​

Answer 1

Solution : (7a2 + 5a + 6) - (5a2 - 2a)

= 7a2+ 5a + 6 - 5a2 + 2a

= 7a2 - 5a2 + 5a + 2a + 6

= 2a2 + 7a + 6

Answer 2

Given,

Two expressions: (5a^2 - 2a) and (7a^2 + 5a + 6)

To find,

The difference between the first expression from the second expression.

Solution,

We can simply solve this mathematical problem using the following process:

According to the question;

By subtracting and simplifying the first expression from the second, and simplifying it, we get;

(7a^2 + 5a + 6) - (5a^2 - 2a)

= 7a^2 + 5a + 6 - 5a^2 + 2a

= (7a^2 - 5a^2) + (5a + 2a) + 6

{by rearranging the terms}

= 2a^2 + 7a + 6

Hence, the difference of (5a^2 - 2a) from (7a^2 + 5a + 6) equals (2a^2 + 7a + 6).