Question

Solve

Answer 1

$8 {x}^{2} + 5 = 35$
${8x}^{2} = 30$
${x}^{2} = 3 \frac{3}{4}$
$x = ( \sqrt{3.75} ) \: \: \: \: \: x = - ( \sqrt{3.75} )$
$x = 1.94 \: \: \: \: x = - 1.94$

Answer 2

Answer:

The solutions are $1.94$ and $-1.94$

Step-by-step explanation:

we have

$8x^{2} +5=35$

Solve for x

Subtract $5$ both sides

$8x^{2} +5-5=35-5$

$8x^{2}=30$

Divide by $8$ both sides

$8x^{2}/8=30/8$

$x^{2}=15/4$

Take square root both sides

$x=(+/-)\sqrt{\frac{15}{4}} \\ \\x1=\frac{\sqrt{15}}{2}=1.94\\ \\x2=-\frac{\sqrt{15}}{2}=-1.94$

The solutions are $1.94$ and $-1.94$