Question

simplyfy (i) (p+q)^2-(p-q)^2+p^2​

Answer 1

Answer:

${(p + q)}^{2} - {(p - q)}^{2} + {p}^{2} \\ = {p}^{2} + {q}^{2} + 2pq - {p}^{2} - {q}^{2} + 2pq + {p}^{2} \\ = 4pq \: + {p}^{2}$