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
\(4t^{2} + 7t - 1 = 0\)
Using a = 4, b = 7, c = -1.
\(x = \frac{-b \pm \sqrt{b^{2} - 4ac}}{2a}\)
= \(\frac{-7 \pm \sqrt{7^{2} - 4(4)(-1)}}{2(4)}\)
= \(\frac{-7 \pm \sqrt{49 + 16}}{8}\)
= \(\frac{-7 \pm \sqrt{65}}{8}\)
= \(\frac{-7 \pm 8.0623}{8}\)
The positive answer = \(\frac{-7 + 8.0623}{8} = \frac{1.0623}{8}\)
\(\approxeq 0.1328\) (4 decimal place)
A factory worker earns ₦50,000 per month out of which he spends 15% on his children's educatio...
If \(6x^3 + 2x^2 - 5x + 1\) divides \(x^2 - x - 1\), find the remainder....
If tan x = \(\frac{4}{3}\), 0\(^o\) < x < 90\(^o\), find the value of sin x - cos x...
If x : y = \(\frac{1}{4} : \frac{3}{8}\) and y : z = \(\frac{1}{3} : \frac{4}{9}\), find x : z...
Simplify \(\frac{2-18m^2}{1+3m}\)...
At what rate per cent per annum will N520.00 yield a simple interest of N39.00 in three years? ...