Question

what is the answer? ​

Answer 1

Answer:

x=-9,9

Step-by-step explanation:

$\frac{x^{2} +9}{x+9} =\frac{90}{x+9}$

Multiply each side by (x+9) to cancel out the denominators

$x^2+9=90$

Subtract 9 from each side

$x^2=81\\\sqrt{x^2} =\sqrt{81}$

Square root each side to cancel out the x^2

$x=\frac{+}{-} 9$