1. (х-5)²-(25-10х)= х²-10х+25-25+10х = х²
2. (2-х)²-(х-6)(х+6)=1
4-4х+х²-(х²-36)=1
4-4х+х²-х²+36=1
40-4х=1
-4х=1-40
-4х=-39
х=
1. (х-5)²-(25-10х)= х²-10х+25-25+10х = х²
2. (2-х)²-(х-6)(х+6)=1
4-4х+х²-(х²-36)=1
4-4х+х²-х²+36=1
40-4х=1
-4х=1-40
-4х=-39
х=