Question

factors of m^2-4m-21​

Answer 1

Answer:

m^2-4m-21

m^2-7m +3m-21

m(m-7) +3(m-7)

(m+3) (m-7)

m-3, 7

Answer 2

Answer:

$(m-7)(m+3)$

Step-by-step explanation:

$m^{2} -4m-21$

⇒ $m^{2} +3m-7m-21$

⇒ $m(m+3)-7(m+3)$

⇒ $(m-7)(m+3)$

∴ The factors are $(m-7)(m+3)$

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