1.

1. Factorise the following expressions by spiliting the middle term.(a) 21x^2 - 13x - 20​

Answer»

Step-by-step explanation:

21x2-28x+15x-20

7x(3x-4)+5(3x-4)

(3x-4)(7x+5)

X=4/3. x= -5/3



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