Question

Ответьтте 121-(11-x)(x+11)=187+x (x+11)

Answer 1

121-(11-х)(11+х)=187+х^2+11х
121-(121-x^2)=187+x^2+11x
121-121+x^2=187+x^2+11x
x^2+x^2-11x=187
-11х=187
х=187/ -11
х=-17.