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Answer:
1. Simplify
a)
b)
c)
d) (9xy - 4yz) + (3yx - 2zy) = 12xy - 6yz
e)
f)
2. Find the values using identities
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
3. Simplify
(a)
(b)
(c)
(d)
Step-by-step explanation:
1. Simplify
a)
b) (8y - 5x)(8y + 2x)
c)
d) (9xy - 4yz) + (3yx - 2zy) = 12xy - 6yz
e)
f)
∴ , ∴
2. Find the values using identities
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
3. Simplify
(a)
(b)
(c)
(d)
∴