CA=√(d-e²)=d-e
7. (√1+d²)² + (√²+1)'. =?
(1 + ²) + (e²+1)
8.
9.-1 MABMBC
=
2
2+d²+e² =
2 =
-1 = de
OA. -2de
OB. (A + B)2
OC. A²+ B²
OD. (d-e)2
d²2de + e²
d²2de + e²
-2de
Which expression is missing from step 7?
Pythagorean theorem
simplify
substitution property of equality