rozwiąż równania( za pomocą wzorów skróconego mnożenia )
4x²(x+4)-1(x+4)=0
9x²(x²-4)-49(x²-4)=0
9x³+ 27x²-25x-75=0
(x+4)(4x2-1)
x1+4=0
x1=-4
4x22-1=0
4x22=1
x=1/2 lub x=-1/2
-------------------------------------
(x2-4)(9 x2-49)
x12=2 lub x12=-2
9x22=49
x2=3/7 lub x2=-3/7
----------------------------------------------------
9x2(x+3)-25(x+3)
(x+3)( 9x2-25)
x1=-3
9x2=25
x2= 3/5 lub x2=-3/
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4x²(x+4)-1(x+4)=0
(x+4)(4x2-1)
x1+4=0
x1=-4
4x22-1=0
4x22=1
x=1/2 lub x=-1/2
-------------------------------------
9x²(x²-4)-49(x²-4)=0
(x2-4)(9 x2-49)
x12=2 lub x12=-2
9x22=49
x2=3/7 lub x2=-3/7
----------------------------------------------------
9x³+ 27x²-25x-75=0
9x2(x+3)-25(x+3)
(x+3)( 9x2-25)
x1=-3
9x2=25
x2= 3/5 lub x2=-3/