Question

tìm x biết 

x² - 10x =-25

Answer 1

x^2-10x=-25

x^2-10x+25=0

x^2-2x5+5^2=0

(x-5)^2=0

x-5=0

x=5

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Answer 2

 

x² - 10x =-25

<=>x²-10x+25=0

<=>(x-5)²=0

<=>x-5=0

<=>x=5

 

Answer 3

2(x2-10x+25)-x2+25=0