The equation of a line in the form x= a creates one of these

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

Find the missing dimension! need asap! tiny square is a =3025 in ²

20 points plus brainliest andwer plus my hover hoard im v desperate ! evaluate the polynomial for x=-2 in the equation -3x^3+7x^2-7x-1 (simplify your answer)