Question

multimea solutiilor intregi ale ecuatiei x la a 2a= 25

Answer 1

x²=25
x=√25
x=+5
x=-5

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Answer 2

x²=25=0⇔x²-25=0⇔(x-5)(x+5)=0
x-5=0 sau x+5=0
x=5 sau x=-5
x∈{-5;5}