Question
Find the roots
x1=67−85,x2=67+85
Alternative Form
x1≈−0.369924,x2≈2.703257
Evaluate
3x2−7x−3
To find the roots of the expression,set the expression equal to 0
3x2−7x−3=0
Substitute a=3,b=−7 and c=−3 into the quadratic formula x=2a−b±b2−4ac
x=2×37±(−7)2−4×3(−3)
Simplify the expression
x=67±(−7)2−4×3(−3)
Simplify the expression
More Steps

Evaluate
(−7)2−4×3(−3)
Multiply
More Steps

Multiply the terms
4×3(−3)
Rewrite the expression
−4×3×3
Multiply the terms
−36
(−7)2−(−36)
Rewrite the expression
72−(−36)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
72+36
Evaluate the power
49+36
Add the numbers
85
x=67±85
Separate the equation into 2 possible cases
x=67+85x=67−85
Solution
x1=67−85,x2=67+85
Alternative Form
x1≈−0.369924,x2≈2.703257
Show Solution
