Question

5 Simplify:
(i) (2a²- 7b²) + (a² + 4ab + 2b²) -
(5a² - 3ab - 2b²).
(ii) From the sum of a²+ 3ab-4b²and 9a²
- 6ab + 2b², subtract a² - 6ab-4b²
(iii) What should be added to
3x² + 3xy - 2y² to get 5x²+ 2xy + 3y²??
(iv) What must be subtracted from
6x + 8xy + 8y to get 7x - 4xy + 8y?
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Answer 1

Answer:

$i . - 3 {a}^{2} - 5 {b}^{2} + 7ab \\ ii.9 {a}^{2} + 3ab + 2 {b }^{2} \\ iii.2 {x}^{2} - xy + 5 {y }^{2}$

This is the answer required.......