Math, asked by raghavn4847, 3 months ago

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

Answers

Answered by samreen168ali

1

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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