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secondary 3 | E Maths
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Rosie
Rosie

secondary 3 chevron_right E Maths chevron_right Singapore

Pls help asap ty

Date Posted: 1 year ago
Views: 170

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x^2 + bx + c intersects x axis at points x=-3 and x=5.

(x-(-3))(x-5) = (x+3)(x-5)
= x^2 + 3x -5x -15
= x^2 - 2x -15

By comparing coefficients, b = -2, c=-15
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Kai Chew
Kai Chew's answer
50 answers (Tutor Details)
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Chia Jun Er, Ashley
Chia Jun Er, Ashley's answer
13 answers (Tutor Details)
Factorisation but reversed