. 8x²+20x
. ______________ first, try to solve the first one...
x-3 ) 8x³ - 4x² -36x -72 so mult x AND -3 by 8x²
. 8x³ -24x² (remember it is substract not add)
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. 20x²-36x-72 Now try to solve the first one again..
. 20x²-60x
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24x-72 Now it is simplified
24x=72
x=3 answer is 3
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