: 1.(3а+4)^2= (2х-b)= (b+3)(b-3)= (5y-2x)(5y+2x)=. Created by СеленкО. matematika-ru

: 1.(3а+4)^2= (2х-b)= (b+3)(b-3)= (5y-2x)(5y+2x)=...

СеленкО @СеленкО

August 2022 1 10 Report

: 1.(3а+4)^2= (2х-b)= (b+3)(b-3)= (5y-2x)(5y+2x)=

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dtnth

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$(3a+4)^2=(3a)^2+2*(3a)*4+4^2=9a^2+24a+16$
$(2x-b)=2x-b$
$(2x-b)^2=(2x)^2-2*(2x)*b+b^2=4x^2-4bx+b^2$
$(b+3)(b-3)=b^2-3^2=b^2-9$
$(5y-2x)(5y+2x)=(5y)^2-(2x)^2=25y^2-4x^2$

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