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 : a2 + 3a = (- 3)2 + 3(- 3) = 9 + 0 = 9
Answer» a² + 3a = (- 3)² + 3(- 3) (when a = – 3) = (- 3 × – 3) – 9 (Error is 3(- 3) = 0) = 9 – 9 = 0

Find the errors and correct them in the following :The value of following when a = – 3 : a2 + 3a = (- 3)2 + 3(- 3) = 9 + 0 = 9

Answer»

a² + 3a = (- 3)² + 3(- 3) (when a = – 3)

= (- 3 × – 3) – 9

(Error is 3(- 3) = 0)

= 9 – 9 = 0