show that (2x +1) is a factor 16x³ -8x² + 4x+6 and hence factorise it
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2x+1=0
2x=0-1
2x=-1
x=-1/2
then putting the value of x
16× (-1/2)^3-8(-1/2)+4×(-1/2)+6
16×-1/8-8×-1/2+4×-1/2+6
-16/8+8/2-4/2+6
-16/8-4/2+8/2+6/1
-16×1-4×4+8×4+6×8/8
-16-16+32+48/8
-32+32+48/8
0+48/8
48/8
6 ans
2x=0-1
2x=-1
x=-1/2
then putting the value of x
16× (-1/2)^3-8(-1/2)+4×(-1/2)+6
16×-1/8-8×-1/2+4×-1/2+6
-16/8+8/2-4/2+6
-16/8-4/2+8/2+6/1
-16×1-4×4+8×4+6×8/8
-16-16+32+48/8
-32+32+48/8
0+48/8
48/8
6 ans
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