Question

Factorise:


1.) 28x² – 3x – 1

2.) 15x² – 44x – 20

3.) x² + 5x + 6​

Answer 1

Step-by-step explanation:

formula. for all

b^2 -4ac

1. (-4)^2 -4(28)(-1)

16 + 112

128

128 is the answer

2 (-44)^2 - 4(15)(-20)

1936 +. 1200

3136

3136 is the answer

3. 5^2 - 4(1)(6)

25 - 24

1 is the answer

II hope this is helpful. ....