Pls help me with these three problems asap. Write a number under the radical (square root symbol) that makes the statement true and then explain why it makes your statement true.

the picture is black, pls retake

Step-by-step explanation:

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1