Question

Factorise
t^2 + 9t-36.

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Answer 1

Answer:

(t-3)(t+12)

Step-by-step explanation:

given polynomial is

$t {}^{2} + 9t - 36$

by splitting the middle term ( -36=+12×-3)

so

$t {}^{2} + 12t - 3t - 36$

= t(t+12)-3(t+12)

=(t-3)(t+12)