Question

solve using identity (4x-5y)square ​

Answer 1

$\huge{\mathfrak{anSweR\ :-}}$

${(4x - 5y)}^{2} = {(4x)}^{2} + {(5y)}^{2} - 2(4x)(5y)$

[$Identity \: = {a}^{2} + {b}^{2} - 2ab$ ]

${16x}^{2} + {25y}^{2} - 40xy$