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Question

If 2x45x3+2x2x+a is exactly divisible by x23x+2. Find a

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Solution

Let us first divide 2x45x3+2x2x+a by x23x+2 as shown in the above image.

From the division, we observe that 2x2+x+1 is the quotient and a2 is the remainder.

Now, to find the value of a, we equate the remainder to 0 as shown below:

a2=0a=2

Hence, a=2.

972015_958064_ans_7184e975cbe04596b11f4ecbe9c1c362.jpg

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