a 、( x+2)？ =5 B 、( x-2)？ = 5°C 、( x-2)？ =3 D 、( x+2)？ =3
2. Solving the quadratic equation x with matching method? -2x- 1=0, and the form after the formula is ()
a 、( x-2)？ =3 B 、( x-2)？ = 5°C 、( x- 1)？ =0 D 、( x- 1)？ =2
3. Solving Equation X by Matching Method? +8x+7=0, then the correct formula is ()
a 、( x+4)？ =9 B 、( x-4)？ = 9°C 、( x-8)？ = 16 D 、( x+8)？ =57