lovebug3563
18.05.2021 •
Mathematics
What are the dimensions of one of the identical triangular pieces of the plane? 2 cm base, 3 cm height 3 cm base, 3 cm height 3 cm base, 4 cm height 3 cm base, 6 cm height
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Ответ:
i always use the foil method (first outside inside last) to check my work.
(2a-7)*(a+4)
2a(a)+2a(4) + (-7)(a)+(-7)(4)
2a62+8a-7a-28
then you have to combine like terms , so 2a^2+a-28.. so its correct!
xx