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Theorem negdii 8617
Description: Distribution of negative over addition. (Contributed by NM, 28-Jul-1999.) (Proof shortened by Andrew Salmon, 19-Nov-2011.)
Hypotheses
Ref Expression
negidi.1 𝐴 ∈ ℂ
pncan3i.2 𝐵 ∈ ℂ
Assertion
Ref Expression
negdii -(𝐴 + 𝐵) = ( -𝐴 + -𝐵)

Proof of Theorem negdii
StepHypRef Expression
1 negidi.1 . . . . 5 𝐴 ∈ ℂ
2 pncan3i.2 . . . . 5 𝐵 ∈ ℂ
31, 2addcli 8336 . . . 4 (𝐴 + 𝐵) ∈ ℂ
43negidi 8602 . . 3 ((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = 0
51negidi 8602 . . . . 5 (𝐴 + -𝐴) = 0
62negidi 8602 . . . . 5 (𝐵 + -𝐵) = 0
75, 6oveq12i 6100 . . . 4 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = (0 + 0)
8 00id 8474 . . . 4 (0 + 0) = 0
97, 8eqtri 2259 . . 3 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = 0
101negcli 8601 . . . 4 -𝐴 ∈ ℂ
112negcli 8601 . . . 4 -𝐵 ∈ ℂ
121, 10, 2, 11add4i 8498 . . 3 ((𝐴 + -𝐴) + (𝐵 + -𝐵)) = ((𝐴 + 𝐵) + ( -𝐴 + -𝐵))
134, 9, 123eqtr2i 2265 . 2 ((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = ((𝐴 + 𝐵) + ( -𝐴 + -𝐵))
143negcli 8601 . . 3 -(𝐴 + 𝐵) ∈ ℂ
1510, 11addcli 8336 . . 3 ( -𝐴 + -𝐵) ∈ ℂ
163, 14, 15addcani 8515 . 2 (((𝐴 + 𝐵) + -(𝐴 + 𝐵)) = ((𝐴 + 𝐵) + ( -𝐴 + -𝐵)) ↔ -(𝐴 + 𝐵) = ( -𝐴 + -𝐵))
1713, 16mpbi 145 1 -(𝐴 + 𝐵) = ( -𝐴 + -𝐵)
Colors of variables:    wff set class
This proof depends on syntax axioms:   = wceq 1402   ∈ wcel 2209  (class class class)co 6088  ℂcc 8183  0cc0 8185   + caddc 8188   -cneg 8505
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4251  ax-pow 4313  ax-pr 4348  ax-setind 4686  ax-resscn 8277  ax-1cn 8278  ax-icn 8280  ax-addcl 8281  ax-addrcl 8282  ax-mulcl 8283  ax-addcom 8285  ax-addass 8287  ax-distr 8289  ax-i2m1 8290  ax-0id 8293  ax-rnegex 8294  ax-cnre 8296
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4132  df-opab 4194  df-id 4440  df-xp 4782  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-iota 5340  df-fun 5382  df-fv 5388  df-riota 6041  df-ov 6091  df-oprab 6092  df-mpo 6093  df-sub 8506  df-neg 8507
This theorem is used by:  negsubdii  8618
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