Question

Simplify and find the value of 3(a square +5ab) -5a squared - 12ab , a = 2 & b = 3

Answer 1

10

Explanation:

Given
`3(a^(2) +5ab) -5a^(2) -12ab`

Substitute the values:


`3((2)^(2) +5 * 2 * 3) - 5 (2)^(2) - 12(2)(3)`

3(4+30) - 5(4) - 12x6
3(34) - 20 - 72
102 - 92
= 10