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Secondary 1 | Maths
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tiffany
Tiffany

Secondary 1 chevron_right Maths chevron_right Singapore

hi i need help w this

Date Posted: 3 years ago
Views: 200
Eric Nicholas K
Eric Nicholas K
3 years ago
Should be a Sec 2 topic, but anyway
x^2 - 9 = (x + 3) (x - 3)

891
= 900 - 9
= 30^2 - 3^2
= (30 + 3) (30 - 3)
= 33 x 27

Factors 33 and 27

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Arnold K H Tan
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