Answer:
23 17 31
Step-by-step explanation:
igotitright
You need to add the two quadratics together...
x^2+11x-6+6x^2-3x+9
7x^2+8x+3
We know how we got 90, since a right angle is 90 degrees,
180 degrees are in a triangle.
180-90=90
Find the pair that equals 90 so you get 180 degrees!
If you have more questions don’t have hesitation to ask!
Or add all number to get 180 degrees!