Advertisements
Advertisements
प्रश्न
Is x = –3 a solution of the quadratic equation 2x2 – 7x + 9 = 0?
उत्तर
2x2 – 7x + 9 = 0
For x = –3 to be solution of the given quadratic equation it should satisfy the equation
So, substituting x = –3 in the given equation, we get
L.H.S = 2(–3)2 – 7(–3) + 9
= 18 + 21 + 9
= 48
≠ R.H.S
Hence, x = –3 is not a solution of the quadratic equation 2x2 – 7x + 9 = 0.
APPEARS IN
संबंधित प्रश्न
Solve: (2x+3)2 = 81
Find the quadratic equation, whose solution set is:
{−2, 3}
A plane left 40 minutes late due to bad weather and in order to reach its destination, 1600kms away in time, it had to incease its speed by 400km/ hr from its usual speed. Find the usual speed of the plane.
A piece of cloth cost Rs 5000. If the cost price of the cloth was Rs 5 less per meter, SOm more of the cloth would have been purchased. Find the cost price per meter of cloth and length of the cloth purchased.
Find the value of k for which the equation 3x2 – 6x + k = 0 has distinct and real roots.
Solve, using formula:
x2 + x – (a + 2)(a + 1) = 0
For what values of k does the quadratic equation 4x2 − 12x − k = 0 has no real roots?
In each of the following find the values of k of which the given value is a solution of the given equation:
x2 - x(a + b) + k = 0, x = a
In each of the following find the values of k of which the given value is a solution of the given equation:
x2 + 3ax + k = 0; x = a.
Solve the following equation by using formula :
`(2x + 5)/(3x + 4) = (x + 1)/(x + 3)`
