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secondary 3 | A Maths
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secondary 3 chevron_right A Maths chevron_right Singapore

Pls help, thnku

Date Posted: 4 years ago
Views: 259
snell
Snell
4 years ago
40x² - 480x + 1442
= 40(x² - 12x) + 1442
= 40(x² - 12x + 6²) - 6² x 40 + 1442
= 40(x - 6)² + 2

(b)
min. = 2
no. = 6

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Heng Hong Hwee
Heng Hong Hwee's answer
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^have any qn can ask me!!