factorise 6x^2+31x+18x
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6x^2+4x+27x+18
taking 2x common in 6x^2+4x and 9 in 27x+18
then..
2x(3x+2)+9(3x+2)
then.
(3x+2)(2x+9)
x=-2/3
x=-9/2
taking 2x common in 6x^2+4x and 9 in 27x+18
then..
2x(3x+2)+9(3x+2)
then.
(3x+2)(2x+9)
x=-2/3
x=-9/2
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