Q(m, n) and R(n, -4)
Midpoint : P(2, m)
⟹ (m+n2,n−42)=(2,m)\implies \left( \frac{m+n}{2}, \frac{n-4}{2} \right) = (2, m)⟹(2m+n,2n−4)=(2,m)
m+n=2×2 ⟹ m+n=4…(i)m + n = 2 \times 2 \implies m + n = 4 \dots (i)m+n=2×2⟹m+n=4…(i)
n−4=2×m ⟹ n−4=2m…(ii)n - 4 = 2 \times m \implies n - 4 = 2m \dots (ii)n−4=2×m⟹n−4=2m…(ii)
Solving (i) and (ii) simultaneously,
m = 0 and n = 4.
