Find the value of x if \(\begin{vmatrix}3x^2 & 1 \\10 & x \end{vmatrix}\) = \(\begin{vmatrix}4 & 3 \\3 & 20 \end{vmatrix}\)
Answer & explanation
Correct answer: option 2
On solving the determinants we get
\(3 { x }^{ 3 } -10=71\)
\(3 { x }^{ 3 } =81\)
\({ x }^{ 3 } =27\)
x=3