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Question Number 90013 by ar247 last updated on 20/Apr/20

−p^2 +2027=−q^2   p+q=?

$$−{p}^{\mathrm{2}} +\mathrm{2027}=−{q}^{\mathrm{2}} \\ $$$${p}+{q}=? \\ $$

Commented by mr W last updated on 21/Apr/20

p^2 −q^2 =2027 ← prime  (p−q)(p+q)=1×2027  for p,q∈N  p+q=2027  p−q=1  ⇒p=1014, q=1013

$${p}^{\mathrm{2}} −{q}^{\mathrm{2}} =\mathrm{2027}\:\leftarrow\:{prime} \\ $$$$\left({p}−{q}\right)\left({p}+{q}\right)=\mathrm{1}×\mathrm{2027} \\ $$$${for}\:{p},{q}\in{N} \\ $$$${p}+{q}=\mathrm{2027} \\ $$$${p}−{q}=\mathrm{1} \\ $$$$\Rightarrow{p}=\mathrm{1014},\:{q}=\mathrm{1013} \\ $$

Commented by MJS last updated on 21/Apr/20

for your solution, u=((2027)/2)

$$\mathrm{for}\:\mathrm{your}\:\mathrm{solution},\:{u}=\frac{\mathrm{2027}}{\mathrm{2}} \\ $$

Answered by MJS last updated on 21/Apr/20

p^2 −q^2 −2027=0  p=u−v∧q=u+v  −4uv−2027=0  v=−((2027)/(4u))  p=u+((2027)/(4u))∧q=u−((2027)/(4u))  p+q=2u with u≠0  ⇒ p+q=z; z∈C\{0}

$${p}^{\mathrm{2}} −{q}^{\mathrm{2}} −\mathrm{2027}=\mathrm{0} \\ $$$${p}={u}−{v}\wedge{q}={u}+{v} \\ $$$$−\mathrm{4}{uv}−\mathrm{2027}=\mathrm{0} \\ $$$${v}=−\frac{\mathrm{2027}}{\mathrm{4}{u}} \\ $$$${p}={u}+\frac{\mathrm{2027}}{\mathrm{4}{u}}\wedge{q}={u}−\frac{\mathrm{2027}}{\mathrm{4}{u}} \\ $$$${p}+{q}=\mathrm{2}{u}\:\mathrm{with}\:{u}\neq\mathrm{0} \\ $$$$\Rightarrow\:{p}+{q}={z};\:{z}\in\mathbb{C}\backslash\left\{\mathrm{0}\right\} \\ $$

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