Question

Z każdego z podsanych wzorów wyznacz x.

g) y = x-1/2
h) y = 2/x-1
i) P = 1/3(a *do kwadratu* + 2ax)

Answer 1

g) y = x-1/2 //*2

2y=2x-1

2x-1=2y

2x=2y+1

x=(2y+1)/2

x=y+1/2

h) y = 2/x-1 //*x

yx=2-x

yx+x-2=0

x(y+1)=2

x=2/(y+1)

i) P = 1/3(a *do kwadratu* + 2ax)

P=  1/3(a² + 2ax) 

P=1/3a²+2/3ax //*3

3P= a²+2ax

3P-a²=2ax

x=(3P-a²)/2a

 

 

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