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Q : 4 (b) Simplify $\small a(a^2+a+1)+5$ and find its value for

(iii) $\small a=-1$

Answers (1)

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We have $\small a(a^2+a+1)+5$ .

or $\small a(a^2+a+1)+5 = a^3+a^2+a+5$

Put a = (-1)

= $= (-1)^3+(-1)^2+(-1)+5 = -1 + 1 -1 +5 = 4$

Posted by

Devendra Khairwa

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