If $a = - 2, b = 3$ then simplify the expression $- 3 a^{3} + 5 a b$

Open in App

Solution

Given: $a = - 2$ & $b = 3$
To simplify: $- 3 a^{3} + 5 a b$
$\Rightarrow - 3 (- 2)^{3} + 5 (- 2) (3)$
$\Rightarrow - 3 (- 8) + 5 (- 6)$
$\Rightarrow 24 - 30$
$\Rightarrow - 6$ .

Suggest Corrections

Similar questions

Find the value of the expression 5ab for a = 3, b = 2.

{2 a}^{3} - {3 a}^{2} b + {5 a b}^{2} - a b

2 a^{3} - 3 a^{2} b + 5 a b^{2} - a b

2 (a - 3) + 4 b - 2 (a - b) + 5

a^{2} (a^{2} - 2 a - 1) - a (a^{4} - 3 a^{3} + a)

Join BYJU'S Learning Program