What number should be subtracted from x3+4x2−7x+12, if it is to be perfectly divisible by x+3
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x+3=0
x=-3
x3+4x2-7x+12
3(-3) +4(-3) 2 -7 (-3) + 12
-9 + -24 + 21 +12
=0
x=-3
x3+4x2-7x+12
3(-3) +4(-3) 2 -7 (-3) + 12
-9 + -24 + 21 +12
=0
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