Question

x² + x -20 factorise using identity​

Answer 1

Step-by-step explanation:

Using (a+b)

2

=a

2

+2ab+b

2

x

2

+

x

2

1

+2

=(x)

2

+2×x×

x

1

+(

x

1

)

2

=(x+

x

1

)

2