Pls !
use the quadratic formula to solve the equation
-x^2+7=5

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

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: