zad. 2 a) (3+√2) do kwadratu b) (1-√5) do kwadratu c) (4-3√2) do kwadratu d) (2√7+3) kwadrat e) (2√5+√3) kwadrat f) (√6-2√3)kwdrat g) (√8- √2/2) kwadrat h) (√2/2+√3) kwadrat wzory skroconego mnozenia , zrob tyle ile potrafisz . ;* nagrodze
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a) (3+√2) ²=
( 3 + √2)(3+√2)=
3²+3√2+3√2+√2²= lub 3²+ 2*3*√2+ √2²
9 + 6√2+2=
11 + 6√2
b) (1-√5)²=
1²- 2 * 1 * √5 + √5²=
1 - 2√5+5=
6 - 2 √5
c) (4-3√2)²=
4² - 2*4*3√2 + ( 3√2)²=
16 -24√2 +18=
34 -24√2
d) (2√7+3) ²=
( 2√7)² + 2*2√7*3 + 3²=
28 + 12√7 +9=
37 +12√7
e)(2√5+√3) ²=
(2√5)² + 2* 2√5*√3 + √3²=
20 + 4 √15 + 3 =
23 + 4√15
f) (√6-2√3)²=
√6² - 2* √6 * 2√3 + ( 2√3)²=
6 - 4 √18 + 12 =
18 - 4 √ 9*2=
18 - 4*3 √2=
18 - 12√2
g) (√8- √2/2) ²=
√8² - 2*√8 * √2/2 + ( √2/2)²=
8 - √16 + 1/2=
8 i 1/2 - 4 =
4 i 1/2
h) (√2/2+√3) ²=
( √2/2 )² + 2 * √2/2*√3 + √3²=
1/2 + √6 + 3 =
3 i 1/2 + √6