factorise 2x^2 +7x +5
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2x^2+2x+5x+5=0
2x(x+1)+5( x+1)=0
(x+1)(2x+5)=0
x+1=0
x= -1
2x+5=0
x=-5/2
2x(x+1)+5( x+1)=0
(x+1)(2x+5)=0
x+1=0
x= -1
2x+5=0
x=-5/2
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