Question

Calculate the numerical value for the following algebraic expressions when a = 1 and b= 2

solve with whole process​

Answer 1

`(28)/(5)`

Explanation:

Substitute a = 1, b = 2 into the expression , that is

3(2) +
`(-2)/(5)` (1)³ → 1³ = 1

= 6 -
`(2)/(5)`

=
`(30)/(5)` -
`(2)/(5)`

=
`(28)/(5)` ( = 5
`(3)/(5)` = 5.6 )