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boyakko [2]
3 years ago
6

(c) Factorise x2 +9x + 20

Mathematics
2 answers:
irina1246 [14]3 years ago
6 0

Answer:

(x + 5)(x + 4)

Step-by-step explanation:

Given

x² + 9x + 20

Consider the factors of the constant term (+ 20) which sum to give the coefficient of the x- term (+ 9)

The factors are + 5 and + 4, since

5 × 4 = 20 and 5 + 4 = 9, thus

x² + 9x + 20 = (x + 5)(x + 4)

deff fn [24]3 years ago
3 0

Answer:

Step-by-step explanation:

hello :

x² +9x + 20= (x+4)(x+5)

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