Question

Evaluate the expression when $a=-18$ and $b=-6$.

$\frac{b^2}{a}+4$

Answer 1

Evaluating the expression

The given expression is $\frac{b^2}{a}+4$ where $a=-18$ and $b=-6$.

Substituting value of $a$ and$b$in given expression, we get

$\begin{array}{rcl}\frac{b^2}{a}+4& =& \frac{{(-6)}^2}{-18}+4\\ & =& \frac{36}{-18}+4\\ & =& -2+4\\ & =& +2\end{array}$ [$\because$The quotient of integers with different sign is negative ]

Hence, the required value of the expression is $+2$.