Solve using the quadratic formula. Express answers as exact roots and as approximate roots, to the nearest hundredth.

Question

b) k^2 - 9k = 1
c) 8w^2 = 2 - 3w

Solve to the nearest hundredth.
b) 1.2x^2 + 0.5x - 0.3 = 0

Answer 1

b. y = k^2 - 9k = 1.

Y = K^2 - 9K - 1 = 0,

K = (9 +- sqrt(81-(-4)) / 2=(9+-9.22)/2
= 9.11, and -0.11.

Use same procedure for remaining problems.