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