Question

Factorise : 25a²-c²d²
1 point
5a(a+cd)
(5a+cd)(5a-cd)
5a²-c²d²
None of these
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Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

$\rm \: 25 {a}^{2} - {c}^{2} {d}^{2}$

$\mapsto \rm \: {(5a)}^{2} - {(cd)}^{2}$

$\mapsto \rm \: (5a + cd)(5a - cd)$

$\rm \: option \: \bold{b}$