(x^2-2) (x^2+3x+5)
= x^2(x^2+3x+5) -2(x^2+3x+5)
= x^4 +3x^3 +5x^2 -2x^2 -6x -10
= x^4 +3x^3 +3x^2 -6x -10
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(x^2 - 3x + 5)(x^2 + 3x + 5)
3x^2+3x-60=3(x^2+x+20)=3(x+5)(x-4)
NOTE: xx can be written as x^2 i.e. x squared 3x^2 + 16x + 5 = 3 x^2 + x + 15x + 5 (Since 16x = x + 15x) = x ( 3x + 1 ) + 5 ( 3x + 1 ) = ( x + 5 ) ( 3x + 1 ) Therefore the factors are ( x + 5 ) and ( 3x + 1 )
-1
(3x + 1)(x + 5)