Question

factorise- x square + 8 x - 20​

Answer 1

Answer:

Hi frnd hope my answer helps

Step-by-step explanation:

Explanation:

x

2

−

8

x

−

20

We can Split the Middle Term of this expression to factorise it.

In this technique, if we have to factorise an expression like

a

x

2

+

b

x

+

c

, we need to think of 2 numbers such that:

N

1

⋅

N

2

=

a

⋅

c

=

1

⋅

−

20

=

−

20

AND

N

1

+

N

2

=

b

=

−

8

After trying out a few numbers we get

N

1

=

2

and

N

2

=

−

10

2

⋅

(

−

10

)

=

−

20

, and

2

+

(

−

10

)

=

−

8

x

2

−

8

x

−

20

=

x

2

−

10

x

+

2

x

−

20

=

x

(

x

−

10

)

+

2

(

x

−

1

0

)

(

x

+

2

)

(

x

−

10

)

is the factorised form of the expression.