Question
Solve the quadratic equation
Solve using the quadratic formula
Solve by completing the square
Solve using the PQ formula
x1=−283+3113,x2=28−3+3113
Alternative Form
x1≈−1.246087,x2≈1.031801
Evaluate
18−14x2=3x
Move the expression to the left side
18−14x2−3x=0
Rewrite in standard form
−14x2−3x+18=0
Multiply both sides
14x2+3x−18=0
Substitute a=14,b=3 and c=−18 into the quadratic formula x=2a−b±b2−4ac
x=2×14−3±32−4×14(−18)
Simplify the expression
x=28−3±32−4×14(−18)
Simplify the expression
More Steps

Evaluate
32−4×14(−18)
Multiply
More Steps

Multiply the terms
4×14(−18)
Rewrite the expression
−4×14×18
Multiply the terms
−1008
32−(−1008)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
32+1008
Evaluate the power
9+1008
Add the numbers
1017
x=28−3±1017
Simplify the radical expression
More Steps

Evaluate
1017
Write the expression as a product where the root of one of the factors can be evaluated
9×113
Write the number in exponential form with the base of 3
32×113
The root of a product is equal to the product of the roots of each factor
32×113
Reduce the index of the radical and exponent with 2
3113
x=28−3±3113
Separate the equation into 2 possible cases
x=28−3+3113x=28−3−3113
Use b−a=−ba=−ba to rewrite the fraction
x=28−3+3113x=−283+3113
Solution
x1=−283+3113,x2=28−3+3113
Alternative Form
x1≈−1.246087,x2≈1.031801
Show Solution
