Question

Evaluate the exponent expression 3x–4xy^2 for x = –1 and y = 2.

Answer 1

SOLUTION

Given the question in the question tab, the following are the solution steps to answer the question.

STEP 1: Write the given expression

$3x-4xy^2$

STEP 2: Substitute the given values for x and y into the expression.

$\begin{gathered} x=-1,y=2 \\ 3x-4xy^2=3(-1)-4(-1)(2^2) \\ \Rightarrow-3-(4\times-1\times4) \\ \Rightarrow-3-(-16) \\ -\times-=+ \\ \Rightarrow-3+16 \\ \Rightarrow13 \end{gathered}$

Hence, the evaluation of the exponent expression gives 13