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factorisation (1 Viewer)

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kr73114

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help with factorising, for example:
ax^2-2bxy-4ax+8by
and
x^3+0.008
 
Trebla

Trebla

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kr73114 said:
help with factorising, for example:
ax^2-2bxy-4ax+8by
and
x^3+0.008
Click to expand...
ax² - 2bxy - 4ax + 8by
= ax² - 4ax - 2bxy + 8by
= ax(x - 4) - 2by(x - 4)
= (x - 4)(ax - 2by)

x³ + 0.008
= x³ + 0.2³
= (x + 0.2)(x² - 0.2x + 0.04)
 
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