How do you use substitution to find #x=-2# for #f(x) = -x^4+8x^3+13x-4#?
1 Answer
May 8, 2018
Explanation:
#"substitute x = - 2 into "f(x)" and evaluate"#
#f(color(red)(-2))=-(color(red)(-2))^4+8(color(red)(-2))^3+13(color(red)(-2))-4#
#color(white)(xxxx)=-16-64-26-4=-110#
