Question
Solve the following quadratic equation by using formula method:
$9 y^2-5 y-4=0$
$9 y^2-5 y-4=0$
✓
Answer
1 and $\frac{-4}{9}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In the figure, PA and PB are tangents to the circle drawn from an external point P. CD is a third tangent touching the circle at Q. If PB = 10cm and CQ = 2cm, what is the length PC?
>In figure 7.35, □PQRS is a rectangle. If PQ = 14 cm, QR = 21 cm, find the areas of the parts x, y and z.
Sides of triangles are given below. Determine which of them are right angled triangle.
(i) 8, 15, 17
(ii) 20, 30, 40
(iii) 11, 12, 15
(iv) 20, 16, 12
(i) 8, 15, 17
(ii) 20, 30, 40
(iii) 11, 12, 15
(iv) 20, 16, 12
A number is selected at random from first 50 natural numbers. Find the probability that it is a multiple of 3 and 4.
In the adjoining figure, point P is the centre of the circle and line AB is the tangent to the circle at T. The radius of the circle is 6 cm. Find PB if $\angle TPB =60^{\circ}$.
→Which of the following sequences are A.P. ? If they are A.P. find the common difference.
$– 10, – 6, – 2, 2, . . .$
→$– 10, – 6, – 2, 2, . . .$
Determine nature of roots of the quadratic equations : 2x² - 5x + 7 = 0
Write sample space ‘S’ and number of sample point n(S) for each of the following experiments. Also write events A, B, C in the set form and write n(A), n(B), n(C).
One coin and one die are thrown simultaneously.
Condition for event A : To get head and an odd number.
Condition for event B : To get a head or tail and an even number.
Condition for event C : Number on the upper face is greater than 7 and tail on the coin.
One coin and one die are thrown simultaneously.
Condition for event A : To get head and an odd number.
Condition for event B : To get a head or tail and an even number.
Condition for event C : Number on the upper face is greater than 7 and tail on the coin.
Without actually performing the long division, state whether state whether the following rational numbers will have a terminating decimal expansion or a non terminating repeating decimal expansion.
$\frac{23}{8}$
→$\frac{23}{8}$
If $\sec2\text{A}=\text{cosec(A}-42^\circ),$ where 2A is an acute angles, find the value of A.
→