Question

Lectia -Ecuatii de forma x²=a.a∈Q
2.Rezolvati in R ecuatiile :
j) (x+1)²=1,(7)
i) $\frac{5}{x-1} = \frac{x-1}{45}$
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Answer 1

j)(X+1)^2=1 intreg 7/9
(x+1)^2=16/9
1.x+1=4/3
x1=4/3-1
x1=1/3]
2.x+1=-4/3
x2=-4/3-1
x2=-7/3

i)produsul mezilor egal cu prod extremilor
(x-1)^2=225
1.x-1=15
x1=16
2. x-1=-15
x=-14