And
Answer:
1st
5x²+10x+2x+4
5x(x+2)+2(x+2)
(x+2)(5x+2)
(x+2)=0 and 5x+2=0 is a required answer.
2nd
4x²-16x-5x+20
4x(x-4)-5(x-4)
(4x-5)(x-4) is a required equation.
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