Question

x = a+2 / a-2

b = 1- 2/a

Szukana w obydwu to A

Answer 1

1.

x = (a+2)/(a-2)

x(a-2) = a+2

ax-2x = a+2

ax-a =2x+2

a(x-1) = 2(x+1)  /:(x-1)

a = 2(x+1)/(x-1)

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2.

b = 1- 2/a   I*a

ab = a-2

ab-a = -2

a(b-1) = -2   /:(b-1)

a = -2/(b-1)

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