Question

Factorize it please : a^2+a-20

Answer 1

Answer:

(a+4)(a-5)

Step-by-step explanation:

${a}^{2} + a - 20 \\ = > {a}^{2} + 4a - 5a - 20 \\ = > a(a + 4) - 5(a + 4) \\ = > (a + 4)(a - 5)$

Please marks it as brainliest.

Answer 2

Question :

• Factorize : a² + a - 20

Solution :

⇒ a² + a - 20

By splitting middle term

⇒ a² + 5a - 4a - 20

⇒ a ( a + 5 ) - 4 ( a + 5 )

⇒ ( a - 4 ) ( a + 5 )

To Find value of a

⇒ ( a - 4 ) ( a + 5 ) = 0

When a - 4 = 0

⇒ a = 4

When a + 5 = 0

⇒ a = - 5