Question

factorise m^2-33m+90​

Answer 1

$= {m}^{2} - 33m + 90 \\ = {m }^{2} - 30m - 3m + 90 \\ = m(m - 30) - 3(m - 30) \\ = (m - 3)(m - 30)$

Answer 2

m² - 33m - 90

using middle term split

m² - 3m - 30m - 90

m(m - 3) + 30(m - 3)

(m + 30)(m - 3)

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