Question

(4a² - 5a + 6) - (3a²- 2a - 1) - (a² + a)​

Answer 1

Answer:

2a-7

Step-by-step explanation:

(4a²-3a²-a²)-(-5a+2a+a)-(6+1)

Answer 2

Answer:

Ans. -4a+ 7

Step-by-step explanation:

(4a²-5a+6) - (3a²-2a-1) - (a²+a)

= 4a²-5a+6-3a²+2a+1

=a²-3a+7.

(a²-3a+7) - (a²+a)

=a² -3a+7-a²-a

= ‘-4a+7'

In this question the second bracket's sign's are changed. So, after change the sign to solve this, but the first solve first 2 bracket and after the ans. this is solve to third bracket

Thanks