The positive root of t in the following equation, 4t2 + 7...
The positive root of t in the following equation, 4t2 + 7t - 1 = 0, correct to 4 places of decimal, is
1.0622
10.6225
0.1328
0.3218
2.0132
Correct answer is C
4t2+7t−1=0
Using a = 4, b = 7, c = -1.
x=−b±√b2−4ac2a
= −7±√72−4(4)(−1)2(4)
= −7±√49+168
= −7±√658
= −7±8.06238
The positive answer = −7+8.06238=1.06238
≊0.1328 (4 decimal place)
The angles of a quadrilateral are (x + 10)o, 2yo, 90o and (100 - y)o, Find y in terms of x...
In the diagram, O is the centre of the circle PQRS, ∠PQR = 72° and OR is parallel ...
Calculate the perimeter of a sector of a circle of raduis 12cm and angle 60o. ...
If P3446−23P26=2PP26, find the value of the digit P. ...
If (0.25)y = 32, find the value of y....
Find the value of 2a - b if a + b = 8 and 4a - b = 22 ...
If P(2,3) and Q)2, 5) are points on a graph, calculate the length PQ ...
If a : b = 5 : 8, x : y = 25 : 16; evaluate ax : by...
If x + 1 is a factor of x3 + 3x2 + kx + 4, find the value of k...