Question

devide the following
2x4+3x2+5x+9 by x-1​

Answer 1

Answer:

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ICSE Class 10

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Sum

Find the remainder (without division) on dividing 3x2 + 5x – 9 by (3x + 2)

SOLUTION

Let 3x + 2 = 0,

then 3x = –2

⇒ x =

-23

Substituting the value of x in f(x)

f(x) = 3x2 + 5x – 9

=

3(-23)2+5(-23)-9

=

3×49-5×23-9

=

43-103-9

=

-63-9

= –2 – 9

= –11

∴ Remainder = –11.