Kwadrat różnicy przedstaw w postaci sumy algebraicznej. a) (2x-1)² ,b) (3b-2)², c) (x-4y)², d) (3x-5y)²
a)...=4x²-4x+1
b)...=9b²-12b+4
c=...=x²-8xy+16y²
d)...=9x²-30xy+25y²
(a-b)²-a²-2ab+b²
a)
(2x-1)²=4x²-4x+1
b)
(3b-2)²=9b²-12b+4
c)
(x-4y)²=x²+16y²-8xy
d)
(3x-5y)²=9x²+25y²-30xy
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a)...=4x²-4x+1
b)...=9b²-12b+4
c=...=x²-8xy+16y²
d)...=9x²-30xy+25y²
(a-b)²-a²-2ab+b²
a)
(2x-1)²=4x²-4x+1
b)
(3b-2)²=9b²-12b+4
c)
(x-4y)²=x²+16y²-8xy
d)
(3x-5y)²=9x²+25y²-30xy