Question

Rozwiąz równania.

c) 12-2(x-1)²=4(x-2-(x-3) (2x-5)

d) (x-3) (x+3)-(2x-1)²=x(6-3x)-9

Answer 1

c) 12- 2(x^2-2x+1) = 4x-8 - (2x^2-5x-6x+15)

12 -2x^2+4x-2 =4x-8 -2x^2+11x+15

10 -2x^2 = -2x^2+11x+7

10  = 11x+7

3 = 11x

x = 3/11

 

d) x^2-9 - (4x^2-4x+1) = 6x-3x^2-9

4x-1 = 6x

-1=2x

x=-1/2

 

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