Question

Evaluate 3x3 + 2x² + x + 1 for (i) x = 2 (i) x = -1 (iii) x = 0
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Answer 1

Answer:

(i) x = 2

3*3+2x²+x+1

9+2*2²+2+1

9+8+2+1

20

(ii) x = -1

3*3+2x²+x+1

9+2(-1)²-1+1

9+2-1+1

11

iii) x = 0

3*3+2x²+x+1

9+2*0²+0+1

9+0+0+1

10