Answer:
x = -√2, x2 = √2
Alternative Form:
x1 = -1.41421, x2 = 1.41421
Step-by-step explanation:
-x²+7-5 = 0
-x²+2 = 0
x = -0±√0²-4×(-1)×2 [over] 2×(-1)
x = ±√0+8 [over] -2
x = ±√8 [over] -2
x = ±2√2 [over] -2
x = -±2√2 [over] 2
x = -2√2 [over] 2
x = --2√2 [over] 2
x = -√2
x = √2
