Quadratic equations : solve for x and give your answers correct two decimal places. a) 4x^2 - 7x + 2 = 0b)x^2 - 10x + 6 = 0c) 5x(x + 2) =3

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

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19