Question

Evaluate the following equation if x=-2 and y=3[x to the 2nd power+5]-y

Answer 1

Given the expression;

`\lbrack x^2+5\rbrack-y`

If x = -2 and y =3, we are to substitute the values into the expression and get the result as shown:

`\begin{gathered} =\lbrack(-2)^2+5\rbrack-3 \\ =(4+5)-3 \\ =\text{ 9 -3} \\ =\text{ 6} \end{gathered}`

Hence the coorect answer is 6