Question

-
(3.5a +4.56) ²
-(3.satu
4:56) ²​

Answer 1

${(3.5 + 4.56)}^{2} - {(3.5 - 4.56)}^{2}$

$using \: \: (a + b)(a - b) = {a }^{2} - {b}^{2}$

$(3.5 + 4.56 + 3.5 - 4.56) \times (3.5 + 4.56 - 3.5 + 4.56)$

$(7) \times (9.12)$

$= 63.84$