Question 395154
question 1 : 2a^2-46a+252=0
/2
x^2-23x+121=0
x^2-14x-9x+121=0
x(x-14)-9(x-14)=0
(x-14)(x-9)=0
x=14, x=9

question 2 : x^2-4x=5
x^2-4x-5=0
x^2-5x+x-5=0
x(x-5)+1(x-5)=0
(x-5)(x+1)=0
x=5, x=-1
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