Substitute a=1,b=−39 and c=−378 into the quadratic formula x=2a−b±b2−4ac
x=239±(−39)2−4(−378)
Simplify the expression
Больше Шагов
Evaluate
(−39)2−4(−378)
Multiply the numbers
Больше Шагов
Evaluate
4(−378)
Multiplying or dividing an odd number of negative terms equals a negative
−4×378
Multiply the numbers
−1512
(−39)2−(−1512)
Rewrite the expression
392−(−1512)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
392+1512
Evaluate the power
1521+1512
Add the numbers
3033
x=239±3033
Simplify the radical expression
Больше Шагов
Evaluate
3033
Write the expression as a product where the root of one of the factors can be evaluated
9×337
Write the number in exponential form with the base of 3
32×337
The root of a product is equal to the product of the roots of each factor
32×337
Reduce the index of the radical and exponent with 2