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Theory of Equations Sheet-00

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Faculty of Engineering

Basic Engineering Science. Department


Math 1

Theory of Equations
➢ Choose the correct answer
2 𝑥 3 +2 𝑥 2 +7
1) The reminder (R) of is :
𝑥−2

a) Zero b) -1 c) 17 d) 31
2 𝑥 3 +2 𝑥 2 +7
2) The quotient (Q) of is:
𝑥−2
a) 2𝑥 2 + 6𝑥 + 12 b) 12𝑥 2 + 6𝑥 + 2 c) 31 d) −4 + 2𝑥 − 2𝑥 2

𝑥 5 −3 𝑥 3 +5 𝑥+8
3) The reminder (R) of is :
𝑥+1

a) Zero b) 15 c) 5 d) 11
𝑥 5 −3 𝑥 3 +5 𝑥+8
4) The quotient (Q) of is:
𝑥+1

a) 𝑥 4 + 6 𝑥 3 + 2𝑥 2 − 5 b) 𝑥 4 − 𝑥 3 − 2𝑥 2 + 2𝑥 + 3
c)𝑥 4 − 𝑥 3 − 2𝑥 2 + 2𝑥 − 7 d) 𝑥 4 + 𝑥 3 − 2𝑥 2 − 2𝑥 + 3

2 𝑥 6 −18 𝑥 4 +𝑥 2 −9
5) The reminder (R) of is :
𝑥+3

a) Zero b) 1 c) 7 d) none of above


2 𝑥 6 −18 𝑥 4 +𝑥 2 −9
6) The quotient (Q) of is:
𝑥+3
a)2𝑥 5 + 6𝑥 4 − 𝑥 2 + 3 b) 2𝑥 5 − 6𝑥 4 + 𝑥 + 3
c) 2𝑥 5 − 6𝑥 4 + 𝑥 − 3 d) 𝑁𝑜𝑛 𝑜𝑓 𝑎𝑏𝑜𝑣𝑒
−4 𝑥 4 +5 𝑥 2 +8
7) The reminder (R) of is :
𝑥−3
a) 377 b) -287 c) 271 d) −271
−4 𝑥 4 +5 𝑥 2 +8
8) The quotient (Q) of is:
𝑥−3
a)−4𝑥 3 − 12𝑥 2 − 31𝑥 − 93 b) −4𝑥 3 + 12𝑥 2 − 31𝑥 + 93
c) 4𝑥 3 − 12𝑥 2 + 31𝑥 − 93 d) None of above
2 𝑥 3 +𝑘𝑥 2 −6
9) Find the value of k to make the reminder of equal 3 :
𝑥+1
a) 1 b) 11 c) 25 d) Zero

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Faculty of Engineering
Basic Engineering Science. Department
Math 1

Theory of Equations
3 𝑥 4 +𝑘 𝑥 2 +7
10) Find the value of k to make the reminder of equal to the reminder of
𝑥+1
𝑥 4 +𝑘 𝑥−6
:
𝑥−2

a) 1 b) 11 c) 25 d) Zero
2006 2005
11) What is the remainder when 𝑥 +𝑥 + ⋯ + 𝑥 + 1 is divided by x+1 ?

a) 1 b) 𝑥 c) Cannot be calculated d) 2006

12) What is the polynomial yield a reminder of 2 upon division by (x -1), and a
reminder of 1 upon division by (x -2) ?

a) 𝑥 2 − 4𝑥 + 5 b) 𝑥 3 + 5𝑥 − 2 c) 𝑥 2 − 25𝑥 + 15 d) None of above

13) What is the reminder of polynomial in Eq(12) when divided by (x -1)(x-2)?

a) 1 b) 𝑥 + 3 c) x- 3 d) −𝑥 + 3

14) What is value of k in the polynomial 𝑥 3 − 2𝑥 2 − 5𝑥 + 𝑘 = 0 to make x=3 is a


solution ?

a) 2 b) 4 c) 6 d) Zero

15) After finding k value problem (14), Find the other two solutions?

a) 𝑥 = {} b) 𝑥 = {−2, 1 } c) x={2 , -1 } d) None of above


1 √3
16) Find the quartic polynomial with rational coefficients has roots 1 + √5 and + 𝑖?
2 2
a) 𝑥 4 + 𝑥 3 − 2.5𝑥 2 + 2𝑥 − 1 = 0 b) 𝑥 4 − 3𝑥 3 − 𝑥 2 + 2𝑥 − 1 = 0
c) 𝑥 4 − 3𝑥 3 − 𝑥 − 1 = 0 d) 𝑥 4 − 3𝑥 3 − 2.5𝑥 2 + 2𝑥 − 1 = 0
17) Find the other roots for polynomial in eq 16 ?
1 √3 1 √3
a) 1 + √5 and + 𝑖 b) 1 − √5 and + 𝑖
2 2 2 2
1 √3 1 √3
c) 1 + √5 and − 𝑖 d)1 − √5 and − 𝑖
2 2 2 2

18) What is value of k in the polynomial 𝑥 3 − 𝑘𝑥 2 + 23 𝑥 − 14 = 0 to make x=3 is a


solution ?
80 82
a) b) c) 6 d) 9
9 9

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Faculty of Engineering
Basic Engineering Science. Department
Math 1

Theory of Equations
19) After finding k value problem (18), Find the other two solutions?
55 √15113 √15113
a) 𝑥 = { ∓ } b) 𝑥 = {55 ∓ } c) 𝑥 = {0} d)𝑁one of above
18 18 18

20) What is value of k in the polynomial 𝑥 3 − 9𝑥 2 + 𝑘 𝑥 − 15 = 0 to make x=7 is a


solution ?
a) 10.25 b) 16.14 c) 6.548 d) 1.52
21) After finding k value problem (20), Find the other two solutions?
2 √14 √13 2 √18
a) 𝑥 = {1 ± } b) 𝑥 = {7 ± } c) 10 ± d) None of above
7 4 17

22) How many possible solutions of the polynomial 𝑥 4 − 14 𝑥 3 + 64 𝑥 − 114 𝑥 +


63 = 0 in the interval (0,14) ?

a) 0 b) 1 c) 2 d) 4

➢ What are the solutions for the next Equations


1. 6𝑥 5 + 11𝑥 4 − 33𝑥 3 − 33𝑥 2 + 11𝑥 + 6=0
2. 2𝑥 4 + 𝑥 3 − 6𝑥 2 − 𝑥 + 2=0
3. 3𝑥 6 + 𝑥 5 − 27𝑥 4 + 27 𝑥 − 𝑥 − 3=0

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