Решите уравнение (х+13)2-х2=22

Question

Решите уравнение (х+13)2-х2=22

Answer 1

(х+13)²-х²=22

x²+169+26x-x²=22

26x=22-169

26x=-147

x=-147/26=-5 17/26

Answer 2

(х+13)²-х²=22

x²+26x+169-x²-22=0

26x+169-22=0

26x = -169+22

26x = -147

х = -147/26

х =  -5 17/26

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