Desosalbetsybove Desosalbetsybove

24-11-2016
Mathematics

contestada

Evaluate and Explain

3t(t+2)-3t^2 for t=19
and
Simplifiy
-(3a-2b)-3(-a-b)

Respuesta :

HomertheGenius HomertheGenius

25-11-2016

1 ) 3 t ( t + 2 ) - 3 t² =
= 3 t² + 6 t - 3 t² = 6 t = 6 · 19 = 114

2 ) - ( 3 a - 2 b ) - 3 ( - a- b ) =
= - 3 a + 2 b + 3 a + 3 b = 5 b

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