Question

substract 2a(5a^2 -3ab+a^2)-b(-2b^2+8ab+3a^2)​

Answer 1

Answer:

Explanation:

(i) (2a + b) – (a + b)

= 2a + b – a – b = 2a – a + b – b

= a + 0 = a

(ii) (-2b + 2c) – (b + 3c)

= -2b + 2c – b – 3c

= -2b – b + 2c – 3c

= -3b  - c

(iii) (5a + b) – (-6b + 2a)

= 5a + b + 6b – 2a

= 5a – 2a + b + 6b

= 3a + 7b

(iv) (a3 – 1 + a) – (3a – 2a2)

= a3 – 1 + a – 3a + 2a2

= a3 + 2a2 – 2a – 1

(v) (p + 2) – 1 = p + 2 – 1 = p + 1

(vi) (x + 2y + z) – (- x - y – 3z)

= x + 2y + z + x + y + 3z

= x + x + 2y + y + z + 3z

= 2x + 3y + 4z

(vii) (3a2 – 8ab – 2b2) – (3a2 – 4ab + 6b2)

= 3a2 – 8ab – 2b2 – 3a2 + 4ab – 6b2

= 3a2 – 3a2 – 2b2 – 6b2 – 8ab + 4ab

= 0 – 8b2 – 4ab