А) x^5*x^6=x^11
б) x^12*x^8=x^20
в) x^8*x^15=x^23
г) x^6*x^15=x^21
д) x^6*x^20=x^26
е) x^21*x^12=x^33
x4-25x2+144=0
x^2=t
t^2-25t+144=0
D=625-4*144=49
t1=16
t2=9
Из t1 и t2 следует, что x1=3 x2=-3 x3=4 x4=-4
Решение во вложении-------------------
Не могу добавить написанное. Только скриншот
-x+5y=-1
-x=8
y=1
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