Write standard form and additive inverse of the following expressions.

1.	Write standard form and additive inverse of the following expressions. (i) – 6a(ii) 2 + 7c2(iii) 6x2 + 4x – 5(iv) 3c + 7a – 9b
Answer» (i) Additive inverse of – 6a = – (- 6a) = 6a (ii) Standard form of 2 + 7c² = 7c² + 2 Additive inverse of 7c² + 2 = – (7c² + 2) = – 7c² – 2 (iii) Given expression is in standard form. Additive inverse of 6x² + 4x – 5 = – (6x² + 4x – 5) = – 6x² – 4x + 5 (iv) Standard form of 3c + 7a – 9b = 7a – 9b + 3c Additive inverse of 7a – 9b + 3c = – (7a – 9b + 3c) = – 7a + 9b – 3c

Write standard form and additive inverse of the following expressions. (i) – 6a(ii) 2 + 7c2(iii) 6x2 + 4x – 5(iv) 3c + 7a – 9b

Answer»

(i) Additive inverse of – 6a = – (- 6a) = 6a

(ii) Standard form of 2 + 7c² = 7c² + 2

Additive inverse of 7c² + 2

= – (7c² + 2)

= – 7c² – 2

(iii) Given expression is in standard form. Additive inverse of 6x² + 4x – 5

= – (6x² + 4x – 5)

= – 6x² – 4x + 5

(iv) Standard form of 3c + 7a – 9b = 7a – 9b + 3c

Additive inverse of 7a – 9b + 3c

= – (7a – 9b + 3c)

= – 7a + 9b – 3c