Question
Find the roots
t1=205−365,t2=205+365
Alternative Form
t1≈−0.959339,t2≈1.459339
Evaluate
10t2−5t−14
To find the roots of the expression,set the expression equal to 0
10t2−5t−14=0
Substitute a=10,b=−5 and c=−14 into the quadratic formula t=2a−b±b2−4ac
t=2×105±(−5)2−4×10(−14)
Simplify the expression
t=205±(−5)2−4×10(−14)
Simplify the expression
More Steps

Evaluate
(−5)2−4×10(−14)
Multiply the numbers
More Steps

Multiply the terms
4×10(−14)
Rewrite the expression
−4×10×14
Multiply the terms
−40×14
Multiply the terms
−560
(−5)2−(−560)
Rewrite the expression
52−(−560)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
52+560
Evaluate the power
25+560
Add the numbers
585
t=205±585
Simplify the radical expression
More Steps

Evaluate
585
Write the expression as a product where the root of one of the factors can be evaluated
9×65
Write the number in exponential form with the base of 3
32×65
The root of a product is equal to the product of the roots of each factor
32×65
Reduce the index of the radical and exponent with 2
365
t=205±365
Separate the equation into 2 possible cases
t=205+365t=205−365
Solution
t1=205−365,t2=205+365
Alternative Form
t1≈−0.959339,t2≈1.459339
Show Solution
