Question

(c)
Factorise
x2 +9x + 20

Answer 1

Explanation:

hello :

x² +9x + 20= (x+4)(x+5)

Answer 2

(x + 5)(x + 4)

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)