Quadratic Equation Practice Question and Answer
8 Q: In solving a problem, one student makes a mistake in the coefficient of the first degree term and obtains – 9 and – 1 for the roots. Another student makes a mistake in the constant term of the equation and obtains 8 and 2 for the roots. The correct equation was
3197 05e327c5bd0aa6f23a8fc6e21
5e327c5bd0aa6f23a8fc6e21- 1x2 + 10x + 9 = 0false
- 2x2 – 10x = 16 = 0false
- 3x2 – 10x + 9 = 0true
- 4None of thesefalse
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Answer : 3. "x2 – 10x + 9 = 0"
Q: If α and β are the roots of equation x2 - 2x + 4 - 0, then what is the equation whose roots are α3/β2 and β3/α2?
2349 05dca46ef88990a4b0e8010a2
5dca46ef88990a4b0e8010a2- 1$$x^2 - 4x + 8 = 0 $$false
- 2$$x^2 - 32x + 4 = 0 $$false
- 3$$x^2 - 2x + 4 = 0 $$true
- 4$$x^2 - 16x + 4 = 0 $$false
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Answer : 3. "$$x^2 - 2x + 4 = 0 $$"
Q: What are the roots of the quadratic equations?
$$(x^2 + 3x - 154 = 0)$$
2166 05d9319659fdacf792844437d
5d9319659fdacf792844437d- 111, 14false
- 211, -14true
- 314, -11false
- 414, -22false
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Answer : 2. "11, -14"
Q: If the difference between the roots of the equation Ax2+BX+C = 0 is 4, then which of the following is TRUE?
2162 05dca4966582669277c295e49
5dca4966582669277c295e49- 1$$B^2 - 16A^2 = 4AC + 4B^2 $$false
- 2$$B^2 - 10A^2 = 4AC + 6A^2$$true
- 3$$B^2 - 8A^2 = 4AC + 10A^2 $$false
- 4$$B^2 - 16A^2 = 4A^C + 8B^2$$false
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Answer : 2. "$$B^2 - 10A^2 = 4AC + 6A^2$$"
Q: What are the roots of the equation log10(x2-6x+45) =2?
1765 05daeb0727f47a948b6108660
5daeb0727f47a948b6108660- 19, - 5false
- 2-9, 5false
- 311, -5true
- 4-11, 5false
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Answer : 3. "11, -5"
Q: α and β is two root of a equations $$2x^2-7x+ 12=0 $$ then the value of $$ {α \over β } + {β \over α }=? $$
1694 15e5cce98074319409ea12078
5e5cce98074319409ea12078- 124false
- 2$$ {1 \over 24 }$$true
- 312false
- 4$$ {1 \over 12 }$$false
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Answer : 2. "$$ {1 \over 24 }$$"
Q: If α and β are the roots of the equation x2 + x - 1 = 0, then what is the equation whose roots are and α5 and β5 ?
1514 05f2117bf0fc7110ad91fb34e
5f2117bf0fc7110ad91fb34e- 1$$x^2 - 11x - 1 = 0 $$false
- 2$$x^2 + 11x - 1 = 0$$true
- 3$$x^2 + 7x - 1 = 0 $$false
- 4$$x^2 - 7x- 1 = 0 $$false
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Answer : 2. "$$x^2 + 11x - 1 = 0$$"
Q: In equation $$ {x^{2}-24x+k=0}$$ the first root is x=2 then find out the second root of equation.
1483 05f87f11ae6aa3e1d0bcb886a
5f87f11ae6aa3e1d0bcb886a- 1x=-22false
- 2x=12false
- 3x=22true
- 4x=-12false
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