Use the quadratic formula to solve x^2 + 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

Use the quadratic formula to solve x^2 + 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}

jdoe0001 · Answer

$\large \bf ax^2+bx+c\\quad\

\text{quadratic formula}\
x= \cfrac{ - b \pm \sqrt { b^2 -4ac}}{2a}$

anonymous · Answer

In other words.....

jdoe0001 · Answer

$\bf x^2 + 7x + 8 = 0\ \quad \

x= \cfrac{ - b \pm \sqrt { b^2 -4ac}}{2a}\implies x= \cfrac{ - (7) \pm \sqrt { (7)^2 -4(1)(8)}}{2(1)}$

anonymous · Answer

Actual: x=−1.4384471871911697 and x=−5.561552812808831