Question

A) (-√11+t)(√11+t)

B) (t+z²)(-z²+t)

Answer 1

   
[tex]a)~(- \sqrt{11} +t)(\sqrt{11} +t)= \\ =(t-\sqrt{11})(t+\sqrt{11})=t^2 -(sqrt{11})^2 = \boxed{t^2-11} \\ \\ (t+z^2)(-z^2+t) = \\ =(t+z^2)(t-z^2) =t^2 - (z^2)^2 = t^2 - z^{2\times 2} = \boxed{t^2-z^4}[/tex]