1. Zapisz wyrażenie w postaci iloczynu;
a) 3xdo 3 + 18xdo 2 + 27x
b) 6xdo2 - 7
c) 4x'do 3- 16x
d) xdo 3 + 3xdo 2 - 2x - 6
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a) 3x³ + 18x² + 27x=3x(x² +6x+9)=3x(x+3)²=3x(x+3)(x+3)
b) 6x² - 7 = (√6x-√7)(√6x+√7)
c) 4x ³ - 16x =4x(x²-4)=4x(x-2)(x+2)
d)x³ + 3x²- 2x - 6 = x²(x+3)-2(x+3)=(x²-2)(x+3)=(x-√2)(x+√2)(x+3)