Question

Factorise
${2b}^{3} - {8b}^{2} - 154b$
${x}^{3} - {13x}^{2} + 30x$
${4z}^{3} - {40z}^{2} + 100z$
$- 6 - 3 + {3x}^{2}$
$- 21 + 10r - {r}^{2}$
${2x}^{2} - 2x - 84$
${ - q}^{2} - 3q \: + 40$
${b}^{3} + {22b}^{2} - 48b$
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Answer 1

Answer:

mate they are so confusing please help me