kimberlyrios12p0ts98
01.09.2019 •
Mathematics
49x^2 + 42xy + 9y^2 factor completely.
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Ответ:
To factor a quadratic of the form ax^2+bx+c, you must find two values, j and k, which satisfy two conditions:
jk=ac=441 and j+k=42, so j and k must be 21 and 21.
Now replace bx with jx and kx in the original equation.
49x^2+21xy+21xy+9y^2 now factor 1st and 2nd pair of terms...
7x(7x+3y)+3y(7x+3y) which is equal to
(7x+3y)(7x+3y) which is equal to
(7x+3y)^2
Ответ:
Calculates the volume, lateral area and surface area of a square pyramid given the base side and height.
base side a
height h
6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digitvolume V
lateral area F
surface area S
slant height b
angle of inclination φ
degree
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The base and height of the Great Pyramid of Khufu are calculated as default values (230.4m and 146.6m).