Выполните умножение:
а) (x^2-2x+1)(x^2+2x+1)
б) (2t-v+s)(t+2v-s)
а) (x^2-2x+1)(x^2+2x+1)=((x-1)(x+1))^2=(x^2-1)^2=x^4+1-2x^2
б) (2t-v+s)(t+2v-s)=2t^2-vt+st+4vt-2v^2+2vs-2st+vs-s^2=2t^2-2v^2-s^2+3vt-st+3vs
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Verified answer
а) (x^2-2x+1)(x^2+2x+1)=((x-1)(x+1))^2=(x^2-1)^2=x^4+1-2x^2
б) (2t-v+s)(t+2v-s)=2t^2-vt+st+4vt-2v^2+2vs-2st+vs-s^2=2t^2-2v^2-s^2+3vt-st+3vs