factorisation (1 Viewer)

[kr73114]

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

 

[Trebla]

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

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)