Question

If(x)=x^2 -3√2x -1 then find f(3√2)

Answer 1

f(x)= x²-3√2x-1

at x= 3√2

that is

f(3√2)= (3√2)²- 3√2(3√2)-1
= 18-18-1
= -1

Hope this helps you......

Answer 2

$f(3 \sqrt{2}) =( 3 \sqrt{2} ) { }^{2} - 3 \sqrt{2} (3 \sqrt{2} ) - 1 \\ \\ =$
9*2-9*2-1
18-18-1=-1
-1 is the answer