√(a³ - 7) + b When A = 2 and B = - 4, the value of the expression is

Question

`√(a³ - 7) + b`

When A = 2 and B = - 4, the value of the expression is

Answer 1

..A = 2 and B = - 4, the value of the expression is -3

`√(2^3-7) + (-4)=\\\\√(2^3-7) -4 = \\\\√(8-7)-4=\\ \\√(1) -4= 1-4=-3`

Explanation: