Respuesta :

4) 2a²+a -11

1) If C = 2a²-5 and D = 3-a, then C -2D =?

2) D = 3-a

a=3-D Writing that for a

C -2D Plugging into C and D

2a² -5 - 2(3-a) Applying distributive property

2a²-5 -6 +a Combining like terms

2a² -11 +a

2a²+a -11

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