I believe when X-3=5 the answer would be 8 because 5+3=8.
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It is x = -5
x3 + 2x2 - 8x + 5 = 0 x(2x - 8) + 5 = 0
x=4.
X3-5=3 X3=3+5 X3=8 cube root of X3=cube root of 8 X=1.68 I hope this could help. There's not really any good ways to write algebra in a normal text box.
That's the same as x3 times x3 which equals x6