dohien714 dohien714

20-08-2021
Mathematics

contestada

bài 5: rút gọn
(x +1)^2 – (2x + 1)^2

Respuesta :

Witcher3 Witcher3

20-08-2021

[tex](x+1)^2-(2x+1)^2=\\\\=(x^2+2\cdot x\cdot1+1^2)-((2x)^2+2\cdot2x\cdot1+1^2)=\\\\=(x^2+2x+1)-(4x^2+4x+1)=\\\\=x^2+2x+1-4x^2-4x-1=\\\\=x^2-4x^2+2x-4x+1-1=\boxed{-3x^2-2x}[/tex]

Answer Link

Otras preguntas

what decimal is equivalent to 31%

Keith had 8 1/2 cups of flour. he used 5 2/3 cups to make bread. how many cups of flour does Keith have left

1.50 is 5% of what number?

what year was hitler born

38 is what percent of 76?

By a large margin, which group made up the majority of California's population in 1840? A. Russian traders B. Irish immigrants C. Spanish convicts D. Native Ame

a tied ball game goes into _____ innings

the shallow boarder area surrounding major land masses is called?

A child’s earliest ideas of right and wrong are taught in __________. A-fixed expenses B-an emergency C-the school D-the home I say D but help??

special rules that control the way thing are done