Question

if a is equal to 5 find the value of 3a^2 - 2 (a minus 5)​ full explanation​

Answer 1

Step-by-step explanation:

Given: 2(a

2

+ab)+3−ab

⇒2a

2

+2ab+3−ab

⇒2a

2

+2ab−ab+3

⇒2a

2

+ab+3

⇒2(5)

2

+(5)(−3)+3 [Putting a=5,b=−3]

⇒2×25−15+3

⇒50−15+3

⇒38.