Answer:
a. x = 1.39 , 0.36
b. 9.36, 0.54
c. x = 0.26, -2.26
Step-by-step explanation:
a Using the quadratic formula:-
x = [ -(-7) +/- sqrt ((-7)^2 - 4*4*2)) / (2*4)]
= 7 +/- sqrt(17) / 8
= 7/8 +/- sqrt17/8
x = 1.39 , 0.36
b) x = - (-10) +/- sqrt (100 - 4*1*6) / 2
= 5 +/- sqrt 76 / 2
= 9.36, 0.54
c) 5x(x + 2) = 3
5x^2 + 10x - 3 = 0
x = [-10 +/- sqrt(4*5*-3)] / 10
x = 0.26, -2.26
