Advertisements
Advertisements
प्रश्न
State whether the following quadratic equation have two distinct real roots. Justify your answer.
x(1 – x) – 2 = 0
उत्तर
The equation x(1 – x) – 2 = 0 has no real roots.
Simplifying the above equation,
x2 – x + 2 = 0
D = b2 – 4ac
= (–1)2 – 4(1)(2)
= 1 – 8 < 0
Hence, the roots are imaginary.
APPEARS IN
संबंधित प्रश्न
The 4th term of an A.P. is 22 and the 15th term is 66. Find the first terns and the common
difference. Hence find the sum of the series to 8 terms.
Solve the following equation:
`x - 18/x = 6` Give your answer correct to two significant figures.
In the following determine the set of values of k for which the given quadratic equation has real roots:
2x2 + kx + 3 = 0
Find if x = – 1 is a root of the equation 2x² – 3x + 1 = 0.
Determine whether the given quadratic equations have equal roots and if so, find the roots:
`(4)/(3)x^2 - 2x + (3)/(4) = 0`
Find the values of k so that the sum of tire roots of the quadratic equation is equal to the product of the roots in each of the following:
kx2 + 2x + 3k = 0
In each of the following, determine whether the given numbers are roots of the given equations or not; x2 – x + 1 = 0; 1, – 1
If α and β are the roots of the equation 2x2 – 3x – 6 = 0. The equation whose roots are `1/α` and `1/β` is:
Find the roots of the quadratic equation by using the quadratic formula in the following:
–x2 + 7x – 10 = 0
If b and c are odd integers, then the equation x2 + bx + c = 0 has ______.