Question

Factorise 4x square +4x -15​

Answer 1

Answer:

consider the factors of the product ac which sum to b

4

x

2

−

4

x

+

1

is in standard form

with  

a

=

4

,

b

=

−

4

and  

c

=

1

⇒

a

c

=

4

×

1

=

4

and - 2 , - 2 sum to - 4

split the middle term using these factors

4

x

2

−

2

x

−

2

x

+

1

←

factorise in groups

=

2

x

(

2

x

−

1

)

−

1

(

2

x

−

1

)

take out the common factor  

(

2

x

−

1

)

=

(

2

x

−

1

)

(

2

x

−

1

)

⇒

4

x

2

−

4

x

+

1

=

(

2

x

−

1

)

2

Step-by-step explanation:

Answer 2

Answer:

Hiii....

Hope it helps.....