Factorise: 2x2- 7x - 15 by splitting the middle term. (2) Q7. If 2 5x÷ 2 x =√(5&2^20 ) , find the value of x.
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Answer:-
2x 2−7x−15
=2x2 −10x+3x−15
=2x(x−5)+3(x−5)
=(x−5)(2x+3)
Hope it helps
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