Wykonaj dzialania:
a)(√3 + 2√2)*(4√3 - √2)
b)(3-√7)*(2+2√7)
Wyłacz czynnik przed pierwiastek
a) ∛40
b) ∛375
c) ∛108
Prosze o rozwiazanie. Jednak prosze o to aby te dzialania byly wyraznie napisane z odstepami tak. Prosze o rozwiazanie :) na jutro mi to potrzeba!:)
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z.1
a) (√3 + 2√2 )*(4√3 - √2) = √3*4√3 - √3 * √2 + 2√2 * 4√3 - 2√2 * √2 =
= 4*3 - √6 + 8√6 - 2*2 = 12 + 7√6 - 4 = 8 + 7√6
bo
√2*√2 = 2; √2 * √3 = √6
--------------------------------
b) ( 3 - √7)*(2 + 2√7) = 3*2 +3*2√7 - √7 *2 - √7 *2√7 =
= 6 + 6√7 - 2√7 -2*7 = 6 - 14 + 4√7 = - 8 + 4√7
bo
√7 * √7 = 7
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z.2
a)∛40 = ∛(8*5) = ∛8 * ∛5 = 2∛5
b)
∛375 = ∛(125*3) = ∛125 * ∛3 = 5∛3
c)
∛108 = ∛(27 *4) = ∛27 * ∛4 = 3∛4
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