Find the errors and correct them in the following :The value of follow

1.	Find the errors and correct them in the following :The value of following when a = – 3 : a3 – a2 – 3 = (- 3)3 – (-3)2 – 3 = – 9 + 6 – 3 = – 6
Answer» a³ – a² – 3 = (- 3)³ – (- 3)² – 3 (when a = – 3) = (- 3 × – 3 × – 3) – (- 3 × – 3) – 3 = – 27 – (9) – 3 (Error is (- 3)³ = – 9 and (- 3)² = 6) = – 27 – 9 – 3 = – 39

Find the errors and correct them in the following :The value of following when a = – 3 : a3 – a2 – 3 = (- 3)3 – (-3)2 – 3 = – 9 + 6 – 3 = – 6

Answer»

a³ – a² – 3

= (- 3)³ – (- 3)² – 3 (when a = – 3)

= (- 3 × – 3 × – 3) – (- 3 × – 3) – 3

= – 27 – (9) – 3

(Error is (- 3)³ = – 9 and (- 3)² = 6)

= – 27 – 9 – 3 = – 39