9. Wykonaj działania a. (2x - 5y) b. (4x + y)² c. [tex](x - \sqrt{2}) (x + \sqrt{2})[/tex] d. [tex](.... Question from @Nector

June 2022 1 47 Report

9. Wykonaj działania
a. (2x - 5y)
b. (4x + y)²
c. [tex](x - \sqrt{2}) (x + \sqrt{2})[/tex]
d. [tex](1 - \sqrt{5})^{2}[/tex]

FajnyMisiu2001

Obliczenia

$(2x-5y)^2=(2x)^2-2\cdot2x\cdot5y+(5y)^2=\boxed{4x^2-20xy+25y^2}\\\\(4x+y)^2=(4x)^2+2\cdot4x\cdot y+y^2=\boxed{16x^2+8xy+y^2}\\\\(x-\sqrt2)(x+\sqrt2)=x^2-(\sqrt2)^2=\boxed{x^2-2}\\\\(1-\sqrt5)^2=1^2-2\cdot1\cdot\sqrt5+(\sqrt5)^2=1-2\sqrt5+6=\boxed{6-2\sqrt5}$

Wykorzystane wzory

$(a-b)(a+b)=a^2-b^2\\\\(a+b)^2=a^2+2ab+b^2\\\\(a-b)^2=a^2-2ab+b^2$

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8. Bencana banjir bisa disebabakan karena ...A. gempa bumiB. tanah longsorC. gunung meletusD. pembakaran hutanyg bisa jawab kerensumpah soal gak ngotak

Berdasarkan denah tersebut, tentukan luassebenarnya dari ruang keluarga dan kamarmandi !hey guys i need your help

jawab yaato gak follow me and i follow back

lagiiiiiiingasal? jawaban lu gw apus

lagi..... hehebtw klo bisaaa

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ZADANIA W ZAŁĄCZNIKU !

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