Answer:
(x+3)( 5x-3)
Step-by-step explanation:
f(x) = 5x² + 12x – 9
Factor
(x+3)( 5x-3)
The sum of the measures of the angles in a triangle is 180°.
Therefore we have the equation:
2x° + 3x° + 55° = 180°
5x° + 55° = 180° <em>subtract 55° from both sides</em>
5x° = 125° <em>divdie both sides by 5</em>
x° = 25°
<h3>Answer: x = 25</h3>
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000:10 in a middle school case.
