X²-10X+25=7

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X²-10X+25=7X²-10X+25=7X²-10X+25=7X²-10X+25=7(X-5)²=7x=±√7+5

X²-10X+25=7
X²-10X+25=7

X²-10X+25=7
X²-10X+25=7
(X-5)²=7
x=±√7+5