Quadratic Equations Questions and answers

  1. Elementary Mathematics
    1. Quadratic Equations
    2. Simplification
    3. Area and perimeter
    4. Volume and surface area
    5. Geometry
    6. Trigonometry
    7. Polynomials
    8. Height and Distance
    9. Simple and Decimal fraction
    10. Indices and Surd
    11. Logarithms
    12. Trigonometric ratio
    13. Straight lines
    14. Triangle
    15. Circles
    16. Quadrilateral and parallelogram
    17. Loci and concurrency
    18. Statistics
    19. Rectangular and Cartesian products
    20. Rational expression
    21. Set theory
    22. Factorisation
    23. LCM and HCF
    24. Clocks
    25. Real Analysis
1). If \( \Large x^{2}-3x+1=0 \) find the value of \( \Large x+\frac{1}{x} \)
A). 0
B). 3
C). 2
D). 1
2). If \( \Large 2x^{2}+12x+18=0 \), what is the value of x ?
A). 3
B). 2
C). -3
D). -2
3). If one root of \( \Large x^{2}-6kx+5=0 \) is 5, find the value of k.
A). \( \Large -\frac{1}{2} \)
B). -1
C). 1
D). 2
4). If one of the roots of quadratic equation \( \Large 7x^{2}-50x+k=0 \) is 7, then what is the value of k?
A). 7
B). 1
C). \( \Large \frac{50}{7} \)
D). \( \Large \frac{7}{50} \)
5). Find the roots of the equation \( \Large 2x^{2}-11x+15=0 \)
A). \( \Large 3 \ and \ \frac{5}{2} \)
B). \( \Large -3 \ and \ -\frac{5}{2} \)
C). \( \Large 5 \ and \ \frac{3}{2} \)
D). \( \Large -5 \ and \ -\frac{3}{2} \)


6). The quadratic equation whose roots are 3 and -1, is
A). \( \Large x^{2}-4x+3=0 \)
B). \( \Large x^{2}-2x-3=0 \)
C). \( \Large x^{2}+2x-3=0 \)
D). \( \Large x^{2}+4x+3=0 \)
7). \( \Large x^{2}+x-20=0; y^{2}-y-30=0 \)
A). If x>y
B). \( \Large If \ x \ge y \)
C). lfx
D). \( \Large If \ x \le y \)
8). \( \Large 225x^{2}-4=0; \sqrt{225y}+2=0 \)
A). If x>y
B). \( \Large If \ x\ge y \)
C). lfx
D). If x = y or relation cannot be established
9). \( \Large \frac{4}{\sqrt{x}}+\frac{7}{\sqrt{x}}=\sqrt{x;} \) \( \Large y^{2}-\frac{ \left(11\right)^{\frac{5}{2}} }{\sqrt{y}} =0 \)
A). If x>y
B). \( \Large If \ x\ge y \)
C). lfx
D). If x = y or relation cannot be established
10). \( \Large x^{2}-365=364; y-\sqrt{324}=\sqrt{81} \)
A). If x>y
B). \( \Large If \ x \ge y \)
C). lfx
D). \( \Large If \ x \le y \)
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