( 3x + 2) do kwadratu = x(-2 + 9x)
( 3x + 2)² = x(-2 + 9x)
(3x)²+2*3x*2+2²=-2x+9x²
9x²+12x+4=-2x+9x²
9x²-9x²+12x+2x=-4
14x=-4/:14
x≈-0,3
liczę na naj ;d
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( 3x + 2)² = x(-2 + 9x)
(3x)²+2*3x*2+2²=-2x+9x²
9x²+12x+4=-2x+9x²
9x²-9x²+12x+2x=-4
14x=-4/:14
x≈-0,3
liczę na naj ;d