Answer:
A
Step-by-step explanation:
7x7/6x4
2x2+9x−1=x
Step 1: Subtract x from both sides.
2x2+9x−1−x=x−x
2x2+8x−1=0
Step 2: Use quadratic formula with a=2, b=8, c=-1.
x=
−b±√b2−4ac
2a
−(8)±√(8)2−4(2)(−1)
2(2)
−8±√72
4
x=−2+
3
2
√2 or x=−2+
−3
√2
This is what I got but I'm not 100% positive. I checked it on a calculator and it seemed to check out.
