Question

expand (5+4) whole square

Answer 1

Answer:

hope this helps please follow

Answer 2

Answer:

$\sf {(5 + 4)}^{2}$

$\sf \to {5}^{2} + 2(5 \times 4) + {4}^{2}$

$\sf \to25 + 2(20) + 16$

$\sf \to25 + 40 + 16$

$\sf \to25 + 56$

$\red \to\sf81$