Answer:
7317
Step-by-step explanation:
74x98+65=7317
Answer:
3 seconds
Step-by-step explanation:
when h=7 ft
-16t²+49t+4=7
-16t²+49t-3=0
16t²-49t+3=0
16t^2-48t-t+3=0
16t(t-3)-1(t-3)=0
(t-3)(16t-1)=0
t=3,t=1/16
t=1/16 seconds is the time when it just started.
so reqd. time=3 seconds.
value of x is: x= i and x= -i
Step-by-step explanation:
We need to find the value of x from
using quadratic formula.
The term is: ![x^2+1=0](https://tex.z-dn.net/?f=x%5E2%2B1%3D0%E2%80%8B)
The quadratic formula is:
![x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D%5C%5C)
Where a = 1, b=0,c=1
Putting values:
![x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{0\pm\sqrt{(0)^2-4(1)(1)}}{2(1)}\\x=\frac{\pm\sqrt{-4}}{2}\\x=\frac{\pm2i}{2}\\x=\pm i](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D%5C%5Cx%3D%5Cfrac%7B0%5Cpm%5Csqrt%7B%280%29%5E2-4%281%29%281%29%7D%7D%7B2%281%29%7D%5C%5Cx%3D%5Cfrac%7B%5Cpm%5Csqrt%7B-4%7D%7D%7B2%7D%5C%5Cx%3D%5Cfrac%7B%5Cpm2i%7D%7B2%7D%5C%5Cx%3D%5Cpm%20i)
So, value of x is: x= i and x= -i
Keywords: Quadratic formula
Learn more about quadratic formula at:
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Find s8 for the following geometric sequence: 3, –6, 12,
–24. = –255