Question

What does p + q = 1 and p2+ 2pq + q2= 1 stand for (write what each part of the equation stands for)

Answer 1

see explanation

Explanation:

given

p + q = 1 ← square both sides

(p + q)² = 1² ← expand left side using FOIL

p² + pq + pq + q² = 1 ( collect like terms on left side )

p² + 2pq + q² = 1

Then

p + q = 1 and p² + 2pq + q² = 1