please answer this maths question.
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Step-by-step explanation:
2x + 5 = 0
x = -5/2
Put the value of x in the polynomial
x³ + 3x² + 3x + 1
(-5/2)³ + 3*(-5/2)² + 3*(-5/2) + 1
-125/8 + 3*(25/4) + 3*(-5/2) + 1
-125/8 + 75/4 + -15/2 + 1
(-125 + 150 - 60 + 8)/8
(158 - 185)/8
-27/8
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