zastosuj wzory skruconego mnozenia
a
b
c
d
a) 125x^3+150x^2+60x+8
b) 125x^3-150x^2+60x-8
c) 12+4√15+5=17+4√5
d) 1/4-x^2
(5x+2)³=125x³+3·(5x)²·2+3·5x·2² +2³ =125x³+150x²+60x+8
(5x-2)³ =(5x)³-3·(5x)²·(-2) +3·5x·(-2)² - 2³=125x³+150x²+60x-8
(2√3+√5)² =12+4√15+5 =17+4√15
(½-x)(½+x)=¼ -x²
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a) 125x^3+150x^2+60x+8
b) 125x^3-150x^2+60x-8
c) 12+4√15+5=17+4√5
d) 1/4-x^2
(5x+2)³=125x³+3·(5x)²·2+3·5x·2² +2³ =125x³+150x²+60x+8
(5x-2)³ =(5x)³-3·(5x)²·(-2) +3·5x·(-2)² - 2³=125x³+150x²+60x-8
(2√3+√5)² =12+4√15+5 =17+4√15
(½-x)(½+x)=¼ -x²