POTRZEBUJE NA JUTRO. PILNE!
1.
a)
(5x-2)²-(25x²-4)
x=0,2
(5x-2)²-(25x²-4)=1-1+4=4
b)
9x²-25=18-25=-7
2.
4x(-x²+0,5)-2x
25y²-3x(10y-3x)
c)
x²(a+b)+y²(a+b)=(a+b)(x²+y²)
zad.3
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1.
a)
(5x-2)²-(25x²-4)
x=0,2
(5x-2)²-(25x²-4)=1-1+4=4
b)
9x²-25=18-25=-7
2.
a)
4x(-x²+0,5)-2x
b)
25y²-3x(10y-3x)
c)
x²(a+b)+y²(a+b)=(a+b)(x²+y²)
zad.3
a)
b)