Question

please solve.......​

Answer 1

Answer:

a).

$pq(pq + 4)$

b)

${b}^{2} ( {a}^{2} + {c}^{2} )$

Step-by-step explanation:

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

${(ab - bc)}^{2} + 2a {b}^{2} c \\ \\ = {(ab)}^{2} + {(bc)}^{2} - 2ac {b}^{2} + 2ac {b}^{2} \\ \\ = {b}^{2} ( {a}^{2} + {c}^{2} )$