Question

Помогите пожалуйста!
49 -(2-х)² = (7-2+х)*(7+2-х) = ?

Answer 1

49 -(2-х)² = 49 - (2²-2*2x+x²)=49-(4-4x+x²)=49-4+4x-x²=4x-x²+45

Answer 2

49-(2-х)^2=(7-(2-х))(7+2-х)=
(7-2+х)(7+2-х)=(5+х)(9-х)