a) Oblicz wartośc wyrażenia:
(x+1)(x-1)+(x+2)(x-2)-(x+3)(x-3) dla x=√3
b) Wykonaj działania:
(3√6-2√10)(3√6+2√10)=
(√2-√6)(√2+√6)=
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x²-1 + x²-4 - (x²-9)= (√3)² - 1 + (√3)² -4 - (√3)² +9 = 3 - 1 + 3 - 4 -3 = -2
(3√6-2√10)(3√6+2√10)= (3√6)² - (2√10)² = 9 × 6 - 4 × 10 = 54 - 40 = 14
(√2-√6)(√2+√6)= 2 - 6 = -4