Question

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(i) ` (2a-5b-7c)^2`
(ii) ` ( -3a+4b-5c)^2`
(iii) `((1)/(2)a-(1)/(4)b+2)^2`

Answer 1

Correct Answer - (i) ` 4ac^2+25b^2+49c^2-2-ab+70bc- 28ac`
(ii) ` 9a^2+16b^2+25c^2-24ab-40bc+30ac`
(iii) ` (a^2)/(4)+(b^2)/(16)+4-(ab)/(4)-b+2a`