Question

in the equation c²-4=0 c is equal to

Answer 1

Given the following equation:

$c^2-4=0$

notice that we can factor the expression using the conjugate binomials:

$\begin{gathered} c^2-4=0 \\ \Rightarrow(c-2)(c+2)=0 \end{gathered}$

thus, the only values for c that make the equation true are c = 2 and c = -2