Show that the Value of X3 – 8x2 + 12x – 5 is Zero, When X = 1.

Show that the value of x³ – 8x² + 12x – 5 is zero, when x = 1.

Sum

x³ – 8x² + 12x – 5

= (1)³ − 8(1)²+ 12(1) − 5

= 1 − 8 + 12 − 5

= 13 − 13

= 0

Hence proved.

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