Question

Factorise that expression​

Answer 1

x²+9x+20

x²+5x+4x+20

x(x+5)+4(x+5)

(x+5)(x+4)

hence

(x+5) and (x+4) are the factors of polynomial x²+9x+20

x=-5 and x=-4

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Answer 2

Answer:

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