Substitute a=5,b=9 and c=−40 into the quadratic formula s=2a−b±b2−4ac
s=2×5−9±92−4×5(−40)
Simplify the expression
s=10−9±92−4×5(−40)
Simplify the expression
More Steps
Evaluate
92−4×5(−40)
Multiply
More Steps
Multiply the terms
4×5(−40)
Rewrite the expression
−4×5×40
Multiply the terms
−800
92−(−800)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses