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63x²+73x+20=0
(4x+9) (5x+7)=0
4x=-9
x=-9/4
5x=-7
x=-7/5
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Step-by-step explanation:
Given quadratic polynomial is 63x²+73x+20
=>(9×7)x²+45x+28x+(4×5)
=>9x(7x+5)+4(7x+5)
=>(7x+5)(9x+4)
63x²+73x+20=(7x+5)(9x+4)
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