Answer:
8x^2 - 25x +7
Step-by-step explanation:
Substitute the polynomials in
A^2 - (B+C)
(3x-4)^2 - (x+7+x^2+2), simplify the equation
Using foil method, (9x^2-24x+16) - (x+7+x^2+2)
(9x^2-24x+16)-(x^2+x+9), distribute the minus/negative sign to the second parenthesis
(9x^2-24x+16) - x^2-x-9, combine like terms
8x^2 - 25x +7
