100 punktów wzory skróconego mnożenia Proszę zad1 oblicz a) (pierwiastek z 2-2)^2 b) (pierwiastek .... Question from @House3320

January 2019 1 14 Report

100 punktów wzory skróconego mnożenia Proszę
zad1 oblicz
a) (pierwiastek z 2-2)^2
b) (pierwiastek z 2-4)*(4-pierwiastek z 2)

zad 2 Doprowadź wyrażenie do najprostszej postaci a następnie oblicz jego wartość dla podanych wartości zmiennych
(a+0,2)^2 -(a-0,2)^2 dla a =50

zad 3 Rozwiaż nierówność nierówność 2(x-5)^2-3(x+2)^2<6-x^2

zad 4 Rozłóż wyrażenie na czynniki
a) 9-6x+x^2=
b) 4x^2+4x+1=
c) 49-y^2

Epis 1.a)
$(\sqrt{2}-2)^{2} = (\sqrt{2})^{2}-2*2*\sqrt{2}+2^{2} = 2 - 4\sqrt{2}+4 = 6-4\sqrt{2}$
b)
$(\sqrt{2}-4)(4-\sqrt{2}) = -(4-\sqrt{2})(4-\sqrt{2}) = -(4-\sqrt{2})^{2}=-(4^{2}-2*4*\sqrt{2}+(\sqrt{2})^{2}) = -(16-8\sqrt{2}+2) = -(18-8\sqrt{2}) = 8\sqrt{2}-18$

2. $(a+0,2)^{2}-(a-0,2)^{2} = a^{2}+0,2*2*a + 0,2^{2}- (a^{2}-0,2*2*a+0,2^{2}) = a^{2}+0,4a + 0,04-a^{2}+0,4a-0,04 = 0,8a$
a = 50
0,8* 50 = 40

3. $2*(x^{2}-5*2*x+5^{2})-3*(x^{2}+2*2*x+2^{2})\ \textless \ 6-x^{2}\\2x^{2}-10*2*x+25*2 - 3x^{2}-4*3x-4*3 \ \textless \ 6-x^{2}\\-x^{2}-20x-12x+50-12\ \textless \ 6-x^{2}\\-32x+32 \ \textless \ 0\\32x \ \textgreater \ 32\\x \ \textgreater \ 1$

4.a) $9 - 6x + x^{2} = 3^{2}-2*3*x+x^{2} = (x-3)^{2}$
b) $4x^{2} + 4x + 1 = (2x)^{2}+2*2x*1 + 1^{2} = (2x + 1)^{2}$
c) $49 -y^{2} = 7^{2} - y^{2} = (7-y)(7+y)$

Potrzebne wzory:
$a^{2}-b^{2} = (a-b)(a+b)\\(a-b)^{2} = a^{2}-2*a*b + b^{2}\\(a+b)^{2} = a^{2}+2*a*b + b^{2}$

2 votes Thanks 1

Oblicz ile razy energia na czwartej orbicie jest większa niż na drugiej (elektronu)

Answer

House3320 December 2018 | 0 Replies

2.Join the senrences using the linking words in brackets. 1.Paul is generous man.He gives money to charity (who) 2.Fred has a great sense of humour.He can be a bit arrogant at times (but) 3.Katie is very cheerful.She is somtimes bossy to her friends (however) 4.Henrry is short and skinny.He has curly briwn hair (with) 5.Linda is very attractive.She has a great sense of fashion (also) 3.Punctuate the sentences below 1 im glad youre haviing a good time in england 2 youll never believe what paul told me 3 thats all for now see you soon 4 jane harry and i are going to rome next week 5 who is youre best friend at school 4.Put the words in the correct order to form sentences.Add punctuation where necessary 1.gracefully/dances/Jane/very 2.eaten/never/thai food/Tina/has

Answer

House3320 December 2018 | 0 Replies

W jakim czasie spadnie ciało swobodne z wysokości h ? g= 10m/s^2 s=h a=g s=at^2/2

Answer

Oblicz ile razy energia na czwartej orbicie jest większa niż na drugiej (elektronu)

W jakim czasie spadnie ciało swobodne z wysokości h ? g= 10m/s^2 s=h a=g s=at^2/2

Recommend Questions

Life Enjoy

Get in touch

Social