Simplifica:
a) 3a – 4 + 2 – a + 5 =
b) (2x2 – x + 1) + (4 – x2 – 3x) =
c) 5 – (9x + 4) + (3 – 5x) =
d) 5x2 – (4 – x + 4x2) – x2 + 6 =
a) 3a – 4 + 2 – a + 5 =
b) (2x2 – x + 1) + (4 – x2 – 3x) =
c) 5 – (9x + 4) + (3 – 5x) =
d) 5x2 – (4 – x + 4x2) – x2 + 6 =
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b)=x2—4x+5
c)=—14x+4
d)=x+2