kekwnennem kekwnennem 12-09-2022 Mathematics contestada 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