Factorise: (7 3/10)^2

Question 1

Factorise:$(7 3/10)^2 - (2 1/10)^2$

Question 2

$(7 3/10)^2 - (2 1/10)^2$

$= (73/10)^2 - (21/10)^2$

$= (73/10 + 21/10) (73/10 - 21/10)$ ...[a2 b2 = (a + b) (a b)]

$= (94/10) (52/10)$

$= (47/5)(26/5) = 1222/25 = 48 22/25$

kratos · Answer 1 · 2022-03-22T16:42:59+0000

$(7 3/10)^2 - (2 1/10)^2$

$= (73/10)^2 - (21/10)^2$

$= (73/10 + 21/10) (73/10 - 21/10)$ ...[a2 b2 = (a + b) (a b)]

$= (94/10) (52/10)$

$= (47/5)(26/5) = 1222/25 = 48 22/25$

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