Question

s^2+9s-36 factorise!!!!​

Answer 1

Use the sum-product pattern

s^2+9s-36

s^2+12s-3s-36

Common factor from the two pairs

s^2+12s-3s-36

s(s+12)-3(s+12)

Rewrite in factored form

s(s+12)-3(s+12)

(s-3) (s+12)

so the solution is (s-3) (s+12)