Answer: x=−2+√11 or x=−2−√11
Step-by-step explanation:
x2+4x−7=7−7
x2+4x−7=0
For this equation: a=1, b=4, c=-7
1x2+4x+−7=0
Step 2: Use quadratic formula with a=1, b=4, c=-7.
x=
−b±√b2−4ac
2a
x=
−(4)±√(4)2−4(1)(−7)
2(1)
x=
−4±√44
2
x=−2+√11 or x=−2−√11
