Expand (i) (2a−5b−7c)2 (ii) (−3a+4b−5c)2 (iii) (12a−14b+2)2

1.	Expand (i) (2a−5b−7c)2 (ii) (−3a+4b−5c)2 (iii) (12a−14b+2)2
Answer» Expand (i) $(2 a - 5 b - 7 c)^{2}$ (ii) $(- 3 a + 4 b - 5 c)^{2}$ (iii) $(\frac{1}{2} a - \frac{1}{4} b + 2)^{2}$

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