Question

the zero of a polynomial P (m)= m^2-21m-100 is ________

Answer 1

your solution............

Answer 2

$hey \: mate \: here \: is \: your \: answer...$
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$m {}^{2} - 21m - 100 = 0 \\ {m}^{2} - (25 + 4)m - 100 \\ {m}^{2} - 25m + 4m - 100 \\ m(m - 25) + 4(m - 25) \\ (m + 4)(m - 25) \\ \\ m + 4 = 0 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: m - 25 = 0 \\ \: \: \: \: \: \: \: \: m = - 4 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: m = 25$

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$hope \: it \: helps.....$