3) WILL GIVE MEDAL AND FAN!!

Use the quadratic formula to solve x2 + 7x + 8 = 0. Estimate irrational solutions to the nearest tenth.

a. {–12, 5}

b. {–11.1, –2.9}

c. {–5.6, –1.4}

d. {–3.9, 12.1}

Question

3) WILL GIVE MEDAL AND FAN!!

Use the quadratic formula to solve x2 + 7x + 8 = 0. Estimate irrational solutions to the nearest tenth.

a. {–12, 5}

b. {–11.1, –2.9}

c. {–5.6, –1.4}

d. {–3.9, 12.1}

wolf1728 · Answer

a = 1
b = 7
c = 8

x = [-7 +-sqroot (7*7 - 4*1*8)]/2*1
x = [-7 +-sqroot (17] / 2

x1 = [-7  +4.1231056256] / 2

x1 = -2.8768943744 / 2

x1 = -1.4384471872

x1 (rounded to nearest tenth) = -1.4



x2 = [-7  -4.1231056256] / 2

x2 = -11.1231056256 / 2

x2 = -5.5615528128

x2 (rounded to nearest tenth) = -5.6