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CBSE Class 9 Answered

Find the reminder when 3x3 - 4x2 + 7x - 5 is divided by (x - 3) and (x + 3).
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

Let, p(x) = 3x3 - 4x2 + 7x - 5

Remainder when p(x) is divided by (x - 3) is

p(3) = 3(3)3 - 4(3)2 + 7 3 - 5

= 81 - 36 + 21 - 5 = 102 - 41 = 61

Remainder when p(x) is divided by (x + 3) is

p(-3) = 3(-3)3 - 4(-3)2 + 7 (-3) - 5

= -81 - 36 - 21 - 5 = -143

Answered by | 04 Jun, 2014, 03:23: PM
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