Question

(x-7)(x+7)-(x-1)^2=48

Answer 1

решение во вложении..........

Answer 2

$(x-7)(x+7)-(x-1)^2=48 \ x^{2} -49-( x^{2} -2x+1)=48 \ x^{2} -49- x^{2} +2x-1=48 \ 2x=48+49+1 \ 2x=48+50 \ 2x=98 \ x=98:2 \ x=49 \ Otvet:x=49$