Write is a related subtraction fact for 7+6=13

Given f(t) = 282 - 53 +1, determine the function value f(2). do not include f(z) = in your answer

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that

What statement is true? 2x^2-9x+2=-1