10th Class Maths MCQ with Answers
If a and b are roots of 4x2-3x+7 =0, then the value of 1/a+1/b is:
4/7
-3/7
-3/4
3/7
The equation x4 – 49x2 + 36 x +252 = 0 is called……….. equation.
Quartic
Cubic
Linear
Quadratic
If roots of a quadratic equation are real, rational and unequal then possible value of Disc. is…………………..
-25
0
40
36
Discriminant of the x2 – 3x + 3 = 0 is:
3
-3
4
1
?63 = _____________
?
1/?
?2
1
If 3 and 4 are the roots of a quadratic equation then the quadratic equation is:
x2 + 2x + 12 = 0
x2 – 7x + 12 = 0
x2 + 7x + 12 = 0
2x2 + 7x + 12 = 0
Discriminant of equation ax2 + bx + c = 0
-b2 + 4ac
-b2 – 4ac
b2 + 4ac
b2– 4ac
If b2 – 4ac > 0 and is a per feet square, then the root of ax2 + bx + c = 0 are ______________:
irrational and equal
imaginary
rational (real) and unequal (B)
irrational (real) and unequal
b2 – 4ac is called:
discriminant
none of these
value of x
solution set
If roots of a quadratic equation are imaginary, then Disc, is…………
Irrational
Zero
Negative
Positive
The discriminant of ax2 + bx + c = 0 is
b2 -4ac
b2+4ac
-b2-4ac
b2 + 4ac
If b2 – 4ac < 0 then roots of equation ax2 + bx + c = 0 are.
Immaginary
Real
irrational
Rational
Which of the following shows “the product of two consecutive positive numbers.”
x(x+1)
x(x+2)
x(x+4)
x(x+3)
Product of roots of equation 5x2 + 3x – 9 = 0
9/5
3/5
-9/5
-3/5
the roots od x2 + 8x +16 =0 are.
Equal
imagineary
unequal
Irrational
If b2 -4ac > 0 and is a perfect square, then roots of ax2 + bx + c = 0 are.
rational, queal
Irrational, unequal
Irrational, unequal
Irrational, equal
Sum of cube roots of unity is.
1
-1
0
3
Which of the following is true description of nature of roots of a quadratic equation?
Real, imaginary, unequal
Complex, repeated, rational
Real, Rational, equal
Real, irrational, unequal
If for a quadratic equation b2 – 4ac = -47, then roots are ……
Complex
Rational
Irrational
Real
If b2 – 4ac > 0, but not a perfect square then roots of ax2 + bx + c = 0 are.
Irrational
Rational
imaginary
None of these
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