Substitute a=9,b=−7 and c=−4 into the quadratic formula m=2a−b±b2−4ac
m=2×97±(−7)2−4×9(−4)
Simplify the expression
m=187±(−7)2−4×9(−4)
Simplify the expression
More Steps
Evaluate
(−7)2−4×9(−4)
Multiply
More Steps
Multiply the terms
4×9(−4)
Rewrite the expression
−4×9×4
Multiply the terms
−144
(−7)2−(−144)
Rewrite the expression
72−(−144)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses