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

asked Oct 22, 2017 13.1k views

2 votes

Evaluate and Explain

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

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1 vote

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

Tiago Martins answered Oct 28, 2017

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