Question

factories
${a}^{2} + 8a + 15$

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Answer 1

Answer:

a² + 8a +15 = 0

a² +5a +3a +15 =0

a(a+5) + 3(a+5)=0

(a+5)(a+3)=0

a = -5 and a= -3

Answer 2

Step-by-step explanation:

$= > {a}^{2} + 8a + 15$

$= > {a}^{2} + 5a + 3a + 15$

$= > a(a + 5) + 3 (a + 5)$

$= > (a + 3)(a + 5)$

⇒ a+3=0; a+5 =0

⇒a=-3; a=-5