Use the quadratic formula to solve the equation 4x^2-7=4x.
select one:
a. x=-1/2+sqrt2 or x=-1/2-sqrt2
b. x=7/8+sqrt113/8 or x=7/8-sqrt113/8
c. x=1/2+sqrt2 or x=1/2-sqrt2
d. x=2+4sqrt2 or x=2-4sqrt2

its 23

Step-by-step explanation:

hdjd

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92